# Worksheet: Isobaric

In this worksheet, we will practice calculating the change in internal energy and the work done for ideal gasses at constant pressure.

**Q7: **

Four moles of a monatomic ideal gas in a cylinder are at a temperature of . The gas is expanded at a constant pressure equal to 1.0 atm, until the gas doubles in volume.

What is the internal energy change of the gas during its expansion?

How much work was done by the gas during its expansion?

How much heat was transferred to the gas during its expansion?

**Q9: **

An ideal monatomic gas at a pressure of N/m^{2} and a
temperature of 320 K undergoes a
quasi-static isobaric expansion from a volume of cm^{3} to a volume of cm^{3}.

What is the work done by the gas?

What is the temperature of the gas after the expansion?

How many moles of the gas’s molecules are contained in the gas?

What is the change in the internal energy of the gas?

By how much is the gas heated?