Questions from Modern Physics

Q: A thermodynamic system undergoes a cyclic process as shown in Fig.

A thermodynamic system undergoes a cyclic process as shown in Fig. Q19.24. The cycle consists of two closed loops: I and II. (a). Over one complete cycle, does the system do positive or negative work...

Q: The graph in Fig. E19.4 shows a pV-

The graph in Fig. E19.4 shows a pV-diagram of the air in a human lung when a person is inhaling and then exhaling a deep breath. Such graphs, obtained in clinical practice, are normally somewhat curve...

Q: During the time 0.305 mol of an ideal gas undergoes

During the time 0.305 mol of an ideal gas undergoes an isothermal compression at 22.0 °C, 392 J of work is done on it by the surroundings. (a). If the final pressure is 1.76 atm, what was the initial...

Q: A gas undergoes two processes. In the first, the volume

A gas undergoes two processes. In the first, the volume remains constant at 0.200 m3 and the pressure increases from 2.00 × 105 Pa to 5.00 × 105 Pa. The second process is a compression to a volume of...

Q: (a). In Fig. 19.7a, consider the

(a). In Fig. 19.7a, consider the closed loop 1→ 3→ 2→ 4→ 1. This is a cyclic process in which the initial and final states are t...

Q: Six moles of an ideal gas are in a cylinder fitted at

Six moles of an ideal gas are in a cylinder fitted at one end with a movable piston. The initial temperature of the gas is 27.0°C and the pressure is constant. As part of a machine design project, cal...

Q: In which situation must you do more work: inflating a balloon

In which situation must you do more work: inflating a balloon at sea level or inflating the same balloon to the same volume at the summit of Mt. McKinley? Explain in terms of pressure and volume chang...

Q: Five moles of an ideal monatomic gas with an initial temperature of

Five moles of an ideal monatomic gas with an initial temperature of 127°C expand and, in the process, absorb 1500 J of heat and do 2100 J of work. What is the final temperature of the gas?

Q: The process abc shown in the pV-diagram in Fig.

The process abc shown in the pV-diagram in Fig. E19.11 involves 0.0175 mol of an ideal gas. Fig. E19.11: (a). What was the lowest temperature the gas reached in this process? Where did it occur? (...

Q: A gas in a cylinder is held at a constant pressure of

A gas in a cylinder is held at a constant pressure of 1.80 × 105 Pa and is cooled and compressed from 1.70 m3 to 1.20 m3. The internal energy of the gas decreases by 1.40 × 105 J. (a). Find the work d...