Pressure reveals a rigid gas’s stored energy

A monatomic ideal gas in a rigid 4.0 L vessel changes absolute pressure from 80 kPa to 130 kPa.

How much heat enters the gas?

Organize the givens & assumptions

V = 4.0 L
pi = 80 kPa
pf = 130 kPa

Closed fixed amount of ideal gas, constant stated heat capacities, negligible bulk kinetic and gravitational energy changes, and only pressure–volume work. Heat into the gas and work by the gas are positive.

A $500\ \mathrm J$
B $0\ \mathrm J$
C $300\ \mathrm J$
D $200\ \mathrm J$

Try it on paper first. Free sample problems in every collection include the complete reasoning: find one in this collection →