To calculate work, in thermodynamics, the equation would be as follows:
W = - integral of PdV
P is a function of volume so we cannot really take the P out of the integral. INstead, we can use knowledge on ideal gas to relate P and V.
From the ideal gas equation,
P = nRT / V = k/V
91.5 = k / 0.6
k = 54.9
P = 54.9 / V
W = - integral of ( 54.9/V) dV
Integrating the expression from 91.5 to 2.15, we obtain
W = 205.92 Joules
