20 g of helium are placed in a cylinder with a movable piston. The gas is compressed very slowly from a state of (p1 = 5 atm, v1 = 32 x10^-3 m3) to a state of (p2 = 17 atm, v2 = 9 x10^-3 m3). The compression is such that the system moves along a straight line in the (p, v) diagram. What is the maximum temperature reached during the compression?