# Ap Physics

Pages: 13 (2874 words) Published: October 19, 2010
|[pic] |AP Physics B |∆U=±Q±W |KEY | | |Lesson 16 HW |PV=nRT | | | |Outcomes |U=3/2 nRT | | | |1. Determine the work done on or by a confined ideal gas. |[(TH-Tc)/TH]•100=e | | | |2. Apply the First Law of Thermodynamics to solve problems involving | | | | |idealized Carnot Cycles. | | | | |3. Determine the efficiency of a heat engine. | | |

Multiple Choice Practice
|Answer |Number |Question | |C |1. |[pic] |If three identical samples of an ideal gas are taken from initial state I to final state F along | | | | |the paths IAF, IF, and IBF as shown in the p V-diagram on the left, which of the following must be| | | | |true? | | | | | | | | | |(A) The work done by the gas is the same for all three paths. | | | | |(B) The heat absorbed by the gas is the same for all three paths. | | | | |(C) The change in internal energy of the gas is the same for all three paths. | | | | |(D) The expansion along path IF is adiabatic. | | | | |(E) The expansion along path IF is isothermal. | |A |2. |An ideal gas undergoes a cyclic process as shown on the |During which process is no work done on or by the gas? | | | |graph above of pressure p versus volume V. Use for 2-3. | | | | | |(A) AB | | | |[pic] |(B) BC | | | | |(C) CD | | | | |(D) DE | | | | |(E) EA...