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B4 solutions: First law

1. A gas is contained in a cylinder by a moveable piston.Volume = 30cm3Temperature = 305KPressure = 105kPaThe gas undergoes the following cycle:Calculate that the net work done by the gas during this cycle is 1.56JHint:Solution:2. 100g of water are converted to steam by heating water in a piston as shown. Assuming that there is no change of temperature calculate that the increase in internal energy of the water is 0.21MJ

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