Slide 1
... repeating cycle; the change in internal energy over a cycle is zero, as the system returns to its initial state. The high temperature reservoir transfers an amount of heat QH to the engine, where part of it is transformed into work W and the rest, QL, is exhausted to the lower temperature reservoir. ...
... repeating cycle; the change in internal energy over a cycle is zero, as the system returns to its initial state. The high temperature reservoir transfers an amount of heat QH to the engine, where part of it is transformed into work W and the rest, QL, is exhausted to the lower temperature reservoir. ...
Chapter 12 - HCC Learning Web
... Positive work increases the internal energy of the system Negative work decreases the internal energy of the system This is consistent with the definition of mechanical work ...
... Positive work increases the internal energy of the system Negative work decreases the internal energy of the system This is consistent with the definition of mechanical work ...
Chapter 5: thermochemstry
... More on hess’ law • Hess' law allows ΔH rxn to be calculated even when it can’t be measured directly. • To do this, we perform arithmetic operations on chemical equations and known ΔH values. – Chemical equations may be multiplied or divided by a whole number. – When an equation is multiplied by a c ...
... More on hess’ law • Hess' law allows ΔH rxn to be calculated even when it can’t be measured directly. • To do this, we perform arithmetic operations on chemical equations and known ΔH values. – Chemical equations may be multiplied or divided by a whole number. – When an equation is multiplied by a c ...
Thermodynamics
... (Homework) 2 moles of a certain ideal gas is allowed to expand adiabatically and reversibly to 5 atm pressure from an initial state of 20°C and 15 atm. What will be the final temperature and volume of the gas? What is the change in internal energy during this process? Assume a Cp of 8.58 cal/mole K ...
... (Homework) 2 moles of a certain ideal gas is allowed to expand adiabatically and reversibly to 5 atm pressure from an initial state of 20°C and 15 atm. What will be the final temperature and volume of the gas? What is the change in internal energy during this process? Assume a Cp of 8.58 cal/mole K ...
Chapter 8 - FacStaff Home Page for CBU
... Systems always tend toward greater stability unless prevented from doing so, e. g. a dam prevents water from running down hill. Processes that do not occur on their own are nonspontaneous. They occur only if energy is added to the system. Free energy (G) has two components: the total energy or entha ...
... Systems always tend toward greater stability unless prevented from doing so, e. g. a dam prevents water from running down hill. Processes that do not occur on their own are nonspontaneous. They occur only if energy is added to the system. Free energy (G) has two components: the total energy or entha ...
Introduction to Chemistry
... Properties of matter are characteristics that help you describe and identify matter Properties can be described or measured ...
... Properties of matter are characteristics that help you describe and identify matter Properties can be described or measured ...
Atom (A) or Ion (I)
... 20. This substance is an isotope of carbon-12 (12C) 21. The Atomic Theory was first stated in the late 1700s. Which of the following is NOT part of this Atomic Theory? A) All elements are composed of tiny indivisible particles called atoms. B) Atoms are made of smaller particles of positive, neutral ...
... 20. This substance is an isotope of carbon-12 (12C) 21. The Atomic Theory was first stated in the late 1700s. Which of the following is NOT part of this Atomic Theory? A) All elements are composed of tiny indivisible particles called atoms. B) Atoms are made of smaller particles of positive, neutral ...
Review of fundamental principles ? Thermodynamics : Part I
... Thermodynamics is the study of energy interactions between systems and the effect of these interactions on the system properties. Energy transfer between systems takes place in the form of heat and/or work. Thermodynamics deals with systems in equilibrium. A thermodynamic system is defined as a quan ...
... Thermodynamics is the study of energy interactions between systems and the effect of these interactions on the system properties. Energy transfer between systems takes place in the form of heat and/or work. Thermodynamics deals with systems in equilibrium. A thermodynamic system is defined as a quan ...
ENGINEERING_THERMODYNAMICS
... The science, which deals the analysis of various machines by quantity, which involves the transfer of energy into useful work, is called thermodynamics. Many energy conversion devices require the transfer of energy into work. Thermodynamics is applied in various thermal equipments like steam turbine ...
... The science, which deals the analysis of various machines by quantity, which involves the transfer of energy into useful work, is called thermodynamics. Many energy conversion devices require the transfer of energy into work. Thermodynamics is applied in various thermal equipments like steam turbine ...
Thermodynamics of ideal gases
... The reason is that the two fundamental laws of thermodynamics are formulated in terms of the energy and the entropy. Both laws concern processes that may take place in an isolated system which is not allowed to exchange heat with or perform work on the environment. The First Law states that the ener ...
... The reason is that the two fundamental laws of thermodynamics are formulated in terms of the energy and the entropy. Both laws concern processes that may take place in an isolated system which is not allowed to exchange heat with or perform work on the environment. The First Law states that the ener ...
The masses of reactants and products are equal.
... In many other chemical reactions, mass also appears to decrease. That is, the mass of the products appears to be less than the mass of the reactants. In other reactions, the products appear to gain mass. For example, plants grow through a complex series of reactions, but where does their extra mass ...
... In many other chemical reactions, mass also appears to decrease. That is, the mass of the products appears to be less than the mass of the reactants. In other reactions, the products appear to gain mass. For example, plants grow through a complex series of reactions, but where does their extra mass ...
Chapter 1
... oWhen a small amount of work (dw) is supplied to a closed system undergoing a cycle, the work supplied will be equal to the heat transfer or heat produced (dQ) in the system. o If Q amount of heat is given to a system undergoing a change of state and W is work done by the system and transferred duri ...
... oWhen a small amount of work (dw) is supplied to a closed system undergoing a cycle, the work supplied will be equal to the heat transfer or heat produced (dQ) in the system. o If Q amount of heat is given to a system undergoing a change of state and W is work done by the system and transferred duri ...
Energy and Energy Changes Heat Transfer and The Measurement
... the top to the bottom is independent of pathway but the work required may not be! • Some examples of state functions are: – T, P, V, ∆E, ∆H, and S ...
... the top to the bottom is independent of pathway but the work required may not be! • Some examples of state functions are: – T, P, V, ∆E, ∆H, and S ...
Chapter 1 - All Made Easy
... oWhen a small amount of work (dw) is supplied to a closed system undergoing a cycle, the work supplied will be equal to the heat transfer or heat produced (dQ) in the system. o If Q amount of heat is given to a system undergoing a change of state and W is work done by the system and transferred duri ...
... oWhen a small amount of work (dw) is supplied to a closed system undergoing a cycle, the work supplied will be equal to the heat transfer or heat produced (dQ) in the system. o If Q amount of heat is given to a system undergoing a change of state and W is work done by the system and transferred duri ...
Chapter 1 Matter and Energy Classifying Matter – An Exercise
... • The precision of a measured number is – the extent of the agreement between repeated measurements of its value. – If repeated measurements are close in value, then the number is precise, but not necessarily accurate. ...
... • The precision of a measured number is – the extent of the agreement between repeated measurements of its value. – If repeated measurements are close in value, then the number is precise, but not necessarily accurate. ...
Thermochem Practice Test
... What is the standard free energy of compound B in kJ/mol? a) 207.8,b) -207.8,c) 145.0,d) -145.0, 8. For the reaction Cl2O(g) + (3/2)O2(g) ---> 2ClO2(g), delta Ho = 126.4 kJ/mol and delta So = -74.9 J/K mol. At 377oC, delta Go equals: a) 98.3 kJ/mol, b) 77.8 kJ/mol, c) 175.1 kJ/mol, d) 51.5 kJ/mol 9. ...
... What is the standard free energy of compound B in kJ/mol? a) 207.8,b) -207.8,c) 145.0,d) -145.0, 8. For the reaction Cl2O(g) + (3/2)O2(g) ---> 2ClO2(g), delta Ho = 126.4 kJ/mol and delta So = -74.9 J/K mol. At 377oC, delta Go equals: a) 98.3 kJ/mol, b) 77.8 kJ/mol, c) 175.1 kJ/mol, d) 51.5 kJ/mol 9. ...
Using mass to calculate molecular formula
... Empirical formula and Molecular formula Benzene consists of 7.69% H and 92.31%C. Converting this to a formula gives CH. This is the simplest integer ratio. In fact a molecule of benzene has the formula C6H6. Empirical formula CH – simplest whole number ratio. Molecular formula C6H6 – actual number o ...
... Empirical formula and Molecular formula Benzene consists of 7.69% H and 92.31%C. Converting this to a formula gives CH. This is the simplest integer ratio. In fact a molecule of benzene has the formula C6H6. Empirical formula CH – simplest whole number ratio. Molecular formula C6H6 – actual number o ...
Test 9 Review - Evan`s Chemistry Corner
... Collision theory. In order for a reaction to occur, particles of the reactant must collide. Not all collisions cause reactions. An effective collision is one in which the colliding particles approach each other at the proper angle and with the proper amount of energy to cause a reaction. The greater ...
... Collision theory. In order for a reaction to occur, particles of the reactant must collide. Not all collisions cause reactions. An effective collision is one in which the colliding particles approach each other at the proper angle and with the proper amount of energy to cause a reaction. The greater ...
Unit B: Matter and Chemical Change
... SIA pp.93-96 Chemicals should be handled with care at all times, especially if they are caustic (corrosive), explosive, or ...
... SIA pp.93-96 Chemicals should be handled with care at all times, especially if they are caustic (corrosive), explosive, or ...
Covalent Bonds - WordPress.com
... • Most chemical reactions are reversible: Products of the forward reaction become reactants for the reverse reaction • Chemical equilibrium is reached when the forward and reverse reaction rates are equal ...
... • Most chemical reactions are reversible: Products of the forward reaction become reactants for the reverse reaction • Chemical equilibrium is reached when the forward and reverse reaction rates are equal ...
Chemical thermodynamics
Chemical thermodynamics is the study of the interrelation of heat and work with chemical reactions or with physical changes of state within the confines of the laws of thermodynamics. Chemical thermodynamics involves not only laboratory measurements of various thermodynamic properties, but also the application of mathematical methods to the study of chemical questions and the spontaneity of processes.The structure of chemical thermodynamics is based on the first two laws of thermodynamics. Starting from the first and second laws of thermodynamics, four equations called the ""fundamental equations of Gibbs"" can be derived. From these four, a multitude of equations, relating the thermodynamic properties of the thermodynamic system can be derived using relatively simple mathematics. This outlines the mathematical framework of chemical thermodynamics.