# Physics Assignment 8

**Question description**

# The Laws of Thermodynamics

- A 10.0 cm radius piston compresses a gas isothermally from a height of 15.0 cm to 2.50 cm at a constant pressure of 2.0 atm.
- Sketch a PV diagram for the following process:
- A 2.0 L gas undergoes an isovolumetric increase in pressure from 1.0 atm to 2.0 atm
- An isothermal compression from 2.0 atm and 2.0 L to 1.0 atm and 1.0 L
- An isobaric compression from 2.0 L to 1.0 L

- An ideal gas expands at a constant total pressure of 2.5 atm
from 3.45 L to 6.70 L. Heat then flows out of the gas at constant
volume, and the pressure and temperature are allowed to drop until the
temperature reaches its original value. Calculate:
- the total work done by the gas in the process
- the total heat flow into the gas.

- Heat flows into an ideal gas at a constant volume. The pressure
increases from 1.5 atm to 5.5 atm. Next the gas is compressed at
constant pressure from 5.0 L to 2.5 L and goes back to its original
temperature.
- What is the total work done on the gas in the process?
- What is the total change in internal energy?
- What is the total heat flow of the process?

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