Using Energy Concepts and the Ideal Gas Model As shown in Fig. P3.119, a fan draw...

Using Energy Concepts and the Ideal Gas Model

As shown in Fig. P3.119, a fan drawing electricity at a rate of 1.5 kW is located within a rigid enclosure, measuring 3 m x 4 m x 5 m. The enclosure is filled with air, initially at 27°C, 0.1 MPa. The fan operates steadily for 30 minutes. Assuming the ideal gas model, determine for the air (a) the mass, in kg, (b) the final temperature, in °C, and (c) the final pressure, in MPa. There is no heat transfer between the enclosure and the surroundings. Ignore the volume occupied by the fan itself and assume there is no overall change in internal energy for the fan.