A cylinder provided with a movable piston (as shown in the figure) contains 126.1 moles of monoatomic ideal gas at a pressure of 8.8x10^5 Pa, volume of 4.3 m^3, and temperature of 300 K. The cylinder wall is made of a good diathermal material. The external pressure on the piston increased suddenly to 7.3 times the initial pressure. The change in entropy of the surroundings, in units of J/K, equals.
Oa. 1056.87
Ob. 897.94
Oc. 659.55
Od. 1168.12
Oe. 794.64