Flashcards: AP Physics Themodynamics Review
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Created by:
physixdude 
on January 20, 2010
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Description:
These cards provide a quick review of the themodynamic concepts taught in the APB physics course
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Terms | Definitions |
|---|---|
 The name of the process where the volume does not change. | Isovolumetric |
| The name of the process where the pressure does not change. | Isobaric |
| The name of the process where the temperature of the system does not change. | Isothermal |
| The name of the process where the thermal energy is not exchanged between the system and surroundings. | Adiabatic |
| Formula for the efficiency of any heat engine | e=1-(Qc/Qh) |
| Formula for the IDEAL efficiency of any heat engine. | e = 1-(Tc/Th) |
| Which law predicts and increase in the entropy of the universe for any thermodynamic process? | 2nd law says thermal energy flows from hot to cold |
| Which says when a pizza is cooked in an oven for 20 minutes it will be the same temperature as the temperature reporting the temperature of the oven? | Zeroth law: If the temperature of A equals the temperature of B and the temperature of B equals the temperature of C then the temperature of A eqauls the temperature f C. |
| Which process says that dU = 0 | Isothermal because a change in U is indicated by a change in Temperature |
| What temperature scale should be used when relating temperature to energy? | Kelvin Because 0 K equals 0 J of translational energy |
| What is used to measure the average kinetic energy of a molecule | Temperature |
| What formula is used to predict the average kinetic energy of a collection of molecules in an ideal gas? | KE=(3/2)NkT or KE=(3/2)nRT. |
| What process says Q=0 ? | Adiabatic because no heat is exchanged with the surroundings. |
| What process says dU= 0 | Isothermal because the temperature does not change. |
| What process says W=0 | Isochoric or isovolumetric because there is not change in volume |
| What must change in order for work to be preformed by a system? | Volume |
| What does area inside an enclosed shape on PV diagram indicate? | Work by the system. It can be positive or negative. |
| An enclosed shape is drawn on a PV diagram. What is the change in temperature for a process that returns to its initial pressure and volume? | Zero because PV=nRT ...same PV, same nRT. |
| In a Carnot cycle, what follows an isothermal expansion? | Adiabatic expansion |
| In a Carnot cycle, what follows an isothermal compression? | Adiabatic compression |
| In a Carnot cycle, what follows an adiabatic compression? | Isothermal expansion |
| In a Carnot cycle, what follows an adiabatic expansion? | Isothermal compression |
| When during a Carnot cycle is the system insulated? | During all of the adiabatic processes. |
| What process says that the thermal energy flowing into a system equals the work done by the system? | Isothemal because dU=0 Therefore, Q_into the system = W_by the system |
| What process says that the thermal energy flowing into a system will ONLY heat of the system? | Isovolumetric... Because there is not change in volume. Therefore , dU=Q |