A rigid cylinder containing 0.006 ms of nitrogen (molar mass 28 kg/kmol) at 1.04 bar, 15°C, is heated reversibly until the temperature is 90 °C. Calculate the change of entropy and the heat supplied. Sketch the process on a T-, diagram. Take the isentropic index. y, for nitrogen as 1.4, and assume that nitrogen is a perfect gas. (0.001 25 kJ/K; 0.407 kJ)