Q1) The heat capacity at constant volume of hydrogen sulfide at low pressures is given by Eq. Ql-1: C[kJ/(mol*C)] = 0.0252 + 1.547 × 10-$T – 3.012 × 10-°T² .. Eq. QI-1 Where, Tis temperature in °C. A quantity of H;S is kept in a piston-fitted cylinder with initial temperature, pressure, and volume equal to 25°C, 2.0 atm, and 3.0 liters, respectively. i- Calculate the heat (kJ) required to raise the gas temperature from 25°C to 1000°C, if the heating takes place at constant volume (i.e., if the piston does not move).

Air contained in a piston-cylinder assembly undergoes the power cycle shown in the figure below. 4.5 P (bar) 1.2 0 n = i 3 1.0 v (m³/kg) Isothermal process % 4 2 Assuming ideal gas behavior for the air, evaluate the thermal efficiency of the cycle. 3.75 O

calculate the heat required to raise the temperature of 1 mol of methane from 260 to 600 °c in steady flow process at a pressure sufficient low that methane may be considered an ideal gas

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