CHAPTER 2: THE ATOMS AND MOLECULES OF ANCIENT EARTH
... (1) Increase in temperature increases entropy (a) Increase in temperature increases molecular motion. (b) Molecules change state (solid to liquid to gas), resulting in rapid jumps in entropy. (Fig. 2.10) (2) Spontaneous reaction—G is (–). (3) If G is (+), an input of energy is required for reactio ...
... (1) Increase in temperature increases entropy (a) Increase in temperature increases molecular motion. (b) Molecules change state (solid to liquid to gas), resulting in rapid jumps in entropy. (Fig. 2.10) (2) Spontaneous reaction—G is (–). (3) If G is (+), an input of energy is required for reactio ...
6. Macroscopic equilibrium states and state variables (Hiroshi
... Equilibrium states of an isolated system with a constant uniform pressure Experiments have shown that when a single-component macroscopic system is isolated for a while so that the system cannot exchange energy with its outside (it is in fact practically impossible to ensure this perfect blocking of ...
... Equilibrium states of an isolated system with a constant uniform pressure Experiments have shown that when a single-component macroscopic system is isolated for a while so that the system cannot exchange energy with its outside (it is in fact practically impossible to ensure this perfect blocking of ...
Exam 2 Fall 2005 Chemsitry 1211
... problem correctly will gain you some points but you will not receive full credit for any question you do not answer completely. Included in this exam is a periodic table, which should be stapled to the back of the exam. CHEATING IS NOT ALLOWED. ANYONE CAUGHT CHEATING WILL RECEIVE A ZERO ON THIS EXAM ...
... problem correctly will gain you some points but you will not receive full credit for any question you do not answer completely. Included in this exam is a periodic table, which should be stapled to the back of the exam. CHEATING IS NOT ALLOWED. ANYONE CAUGHT CHEATING WILL RECEIVE A ZERO ON THIS EXAM ...
CST Review Part 2
... Conservation of Matter and Stoichiometry State Standard #3 The conservation of atoms in chemical reactions leads to the principle of conservation of matter and the ability to calculate the mass of products and reactants. As a basis for understanding this concept: a. Students know how to describe ch ...
... Conservation of Matter and Stoichiometry State Standard #3 The conservation of atoms in chemical reactions leads to the principle of conservation of matter and the ability to calculate the mass of products and reactants. As a basis for understanding this concept: a. Students know how to describe ch ...
EF - hrsbstaff.ednet.ns.ca
... Calculate the enthalpy of formation (kJ/mol) of CO2(g). The enthalpy of reaction for the equation as written is -540.66 kJ/mol. If the answer is negative, enter the sign and then the magnitude. 2 HCOOH(l) + O2(g) → 2 CO2(g) + 2 H2O(l) . ...
... Calculate the enthalpy of formation (kJ/mol) of CO2(g). The enthalpy of reaction for the equation as written is -540.66 kJ/mol. If the answer is negative, enter the sign and then the magnitude. 2 HCOOH(l) + O2(g) → 2 CO2(g) + 2 H2O(l) . ...
CLASS NOTES- Balancing Chemical Equations.pptx
... balance the equation 4. Check your answer to see if: • The numbers of atoms on both sides of the equation are now balanced • The coefficients are in the lowest possible whole number ratios. (reduced) ...
... balance the equation 4. Check your answer to see if: • The numbers of atoms on both sides of the equation are now balanced • The coefficients are in the lowest possible whole number ratios. (reduced) ...
unit 7 – writing and balancing chemical equations
... (c) If iron(III) nitride is the only product formed in this reaction, write a balanced equation for the reaction. (2) DECOMPOSITION – means “breaking apart”; characterized by having only ONE reactant which simply comes apart into its elements or into smaller compounds (the products); REQUIRES ENERGY ...
... (c) If iron(III) nitride is the only product formed in this reaction, write a balanced equation for the reaction. (2) DECOMPOSITION – means “breaking apart”; characterized by having only ONE reactant which simply comes apart into its elements or into smaller compounds (the products); REQUIRES ENERGY ...
The Gibbs Function of a Chemical Reaction*
... for the Gibbs function to have a minimum between x = 0 and x = xmax. A simple example of a gaseous equilibrium is the dimerization of nitrogen dioxide as already mentioned. Let us take the initial amount of NO2 to be 12 moles, the maximum extent of the reaction 2 NO2 M N2O4 is then 6 moles. The stan ...
... for the Gibbs function to have a minimum between x = 0 and x = xmax. A simple example of a gaseous equilibrium is the dimerization of nitrogen dioxide as already mentioned. Let us take the initial amount of NO2 to be 12 moles, the maximum extent of the reaction 2 NO2 M N2O4 is then 6 moles. The stan ...
20. Chemical Equilibrium
... period of time, the reaction will reach equilibrium. At this point, it may be possible to experimentally determine the concentrations of the reactants and products in the container. The concentration values are then substituted into the equilibrium expression which is then solved for Keq. Let's cons ...
... period of time, the reaction will reach equilibrium. At this point, it may be possible to experimentally determine the concentrations of the reactants and products in the container. The concentration values are then substituted into the equilibrium expression which is then solved for Keq. Let's cons ...
Questions 1-2
... 67. Which of the following describes the changes in forces of attraction that occur as H2O changes phase from a liquid to a vapor? (A) H–O bonds break as H–H and O–O bonds form. (B) Hydrogen bonds between H2O molecules are broken. (C) Covalent bonds between H2O molecules are broken. (D) Ionic bonds ...
... 67. Which of the following describes the changes in forces of attraction that occur as H2O changes phase from a liquid to a vapor? (A) H–O bonds break as H–H and O–O bonds form. (B) Hydrogen bonds between H2O molecules are broken. (C) Covalent bonds between H2O molecules are broken. (D) Ionic bonds ...
200 Ways to Pass the Chemistry - Home 15-16
... 18. The Periodic Law states that the properties of elements are periodic functions of their atomic numbers. Elements are arranged on the modern periodic table in order of increasing ………….. 19. Periods are horizontal rows on the Periodic Table. In which energy level are the valence electrons of the e ...
... 18. The Periodic Law states that the properties of elements are periodic functions of their atomic numbers. Elements are arranged on the modern periodic table in order of increasing ………….. 19. Periods are horizontal rows on the Periodic Table. In which energy level are the valence electrons of the e ...
Chemical equilibrium
In a chemical reaction, chemical equilibrium is the state in which both reactants and products are present in concentrations which have no further tendency to change with time. Usually, this state results when the forward reaction proceeds at the same rate as the reverse reaction. The reaction rates of the forward and backward reactions are generally not zero, but equal. Thus, there are no net changes in the concentrations of the reactant(s) and product(s). Such a state is known as dynamic equilibrium.