Solution: Six moles of a monatomic ideal gas undergo the process shown in the figure. State 1 has pressure p1 = 4.00 x 105 Pa and volume V1 = 2.00 x 10-3 m3. State 2 has pressure p2 = 3.00 x 105 Pa and volume V2 = 6.00 x 10-3 m3.
a) In this process, what is ΔU, the change in the internal energy of the gas?
b) What is the heat flow Q for this process?
c) Does heat flow into the gas or out of the gas?

Six moles of a monatomic ideal gas undergo the process shown in the figure. State 1 has pressure *p*_{1 }= 4.00 x 10^{5} Pa and volume *V*_{1} = 2.00 x 10^{-3} m^{3}. State 2 has pressure *p*_{2 }= 3.00 x 10^{5} Pa and volume *V*_{2} = 6.00 x 10^{-3} m^{3}.

a) In this process, what is Δ*U*, the change in the internal energy of the gas?

b) What is the heat flow *Q* for this process?

c) Does heat flow into the gas or out of the gas?