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Jeopardy PHY101 Chapter 5 Review Study of Heat Study of Heat Basics Constants Heat Transfer Laws Potpourri $100 $100 $100 $100 $100 $100 $200 $200 $200 $200 $200 $200 $300 $300 $300 $300 $300 $300 $400 $400 $400 $400 $400 $400 Basics $100 What is meant by thermal contact? ANSWER Basics $200 What is meant by thermal equilibrium? ANSWER Basics $300 Name the three temperature scales that are in common use. Give the boiling point and the freezing point of water, and absolute temperature in each scale. ANSWER Basics $400 What does Temperature measure? ANSWER Constants $100 What is Avogadro’s number? ANSWER Constants $200 What is the Boltzmann’s Constant? ANSWER Constants $300 What is the Universal Gas Constant? ANSWER Constants $400 What is the Specific Heat of water? ANSWER Heat $100 What is Heat? ANSWER Heat $200 What is Internal energy? ANSWER Heat $300 What is meant by thermal expansion? ANSWER Heat $400 Temperature at which water has the greatest density. ANSWER Transfer $100 What are the 3 methods of Heat Transfer? ANSWER Transfer $200 “Firewalkers" step on the hot ashes and coals from a wood fire without getting their feet burned. How might this be possible? ANSWER Transfer $300 A wood stove in the corner of a cabin causes the entire cabin to become heated. This is an example of __________. ANSWER Transfer $400 Which mechanism of heat transfer will work in a vacuum? ANSWER Laws $100 State the zeroth law of thermodynamics. ANSWER Laws $200 State the first law of thermodynamics. ANSWER Laws $300 State the second law of thermodynamics. ANSWER Laws $400 What is the Ideal Gas Law? ANSWER Potpourri $100 When water boils, its temperature _______. ANSWER Potpourri $200 When droplets of condensation form on the outside of a glass of ice water, it must be that in the air right next to the glass is at _______. ANSWER Potpourri $300 Natural processes tend to increase the _____ of thermodynamic systems. ANSWER Potpourri $400 The air temperature where the humidity reaches the saturation density is called the ___________. ANSWER Basics $100 Answer What is meant by thermal contact? Heat energies can be exchanged. Back to Jeopardy Basics $200 Answer What is meant by thermal equilibrium? Both objects are at the same temperature. Back to Jeopardy Basics $300 Answer Name the three temperature scales that are in common use. Give the boiling point and the freezing point of water, and absolute temperature in each scale. Temperature at 1 atm. Fahrenheit Celsius Kelvin Boiling water 212OF 100OC 373.15 K Freezing Water 32OF 0OC 273.15 K Absolute Zero -459.67OF -273.15OC 0K Back to Jeopardy Basics $400 Answer What does Temperature measure? The average kinetic energy of atoms and molecules in a substance. K.E. ATOM = ½mvAVE² = ½kBT where T in Kelvin Boltzmann’s Constant kB =1.38*10-23 J/K Back to Jeopardy Constants $100 Answer What is Avogadro’s number? NA = 6.02 *1023 units 1 mole contains Avogadro’s number. Back to Jeopardy Constants $200 Answer What is the Boltzmann’s Constant? kB =1.38*10-23 J/K Back to Jeopardy Constants $300 Answer What is the Universal Gas Constant? R = NAkB = 8.31 J/(mole*K) Back to Jeopardy Constants $400 Answer What is the Specific Heat of water? cW = 1.00 cal/(g*OC) = 4186 J/(kg*K) Q = mcWT Back to Jeopardy Heat $100 Answer What is Heat? The form of energy that is transferred between two substances because they have different temperatures. Back to Jeopardy Heat $200 Answer What is Internal energy? The sum of the kinetic and potential energies of all the atoms and molecules in a substance. Back to Jeopardy Heat $300 Answer What is meant by thermal expansion? The size of an object will change due a temperature Usually, increasing temperature but cause an increase in size. L = LOT where = thermal coefficient in 1/OC Back to Jeopardy Heat $400 Answer Temperature at which water has the greatest density. 4 OC The density of water decreases as water cools from 4OC to 0OC. Back to Jeopardy Transfer $100 Answer What are the 3 methods of Heat Transfer? Conduction Direct (Needs physical Contact) Convection Occurs in fluids Radiation Carried by photon Back to Jeopardy Transfer $200 Answer Firewalkers" step on the hot ashes and coals from a wood fire without getting their feet burned. How might this be possible? The ashes are poor conductors of heat. H = kAT/L where k = thermal conductivity coefficient in Watts/(m*K) Back to Jeopardy Transfer $300 Answer A wood stove in the corner of a cabin causes the entire cabin to become heated. This is an example of convection. Back to Jeopardy Transfer $400 Answer Which mechanism of heat transfer will work in a vacuum? Radiation Power = AT4 = 5.67*10-8 Watts/(m²*K4) = emissitivity constant is between 0 (reflector) & 1 (absorber) Back to Jeopardy Laws $100 Answer State the zeroth law of thermodynamics. If Body A in in thermal equilibrium with Body B & If Body B in in thermal equilibrium with Body T then Body A in in thermal equilibrium with Body T. Back to Jeopardy Laws $200 Answer State the first law of thermodynamics. Conservation of energy Internal Energy of a system = Q – Work done by a system OR Internal Energy of a system = Q + Work done on a system Back to Jeopardy Laws $300 Answer State the second law of thermodynamics. There are no perfect heat engines. Back to Jeopardy Laws $400 Answer What is the Ideal Gas Law? PV = NkBT = nRT Back to Jeopardy Potpourri $100 Answer When water boils, its temperature stays constant. Back to Jeopardy Potpourri $200 Answer When droplets of condensation form on the outside of a glass of ice water, it must be that in the air right next to the glass. The relative humidity is near 100%. Back to Jeopardy Potpourri $300 Answer Natural processes tend to increase the entropy of thermodynamic systems Back to Jeopardy Potpourri $400 Answer The air temperature where the humidity reaches the saturation density is called the dew point. Back to Jeopardy Thank You for playing Study of Heat Jeopardy!