Atmospheric air at a pressure of 1atm and a dry-bulb temperature of 32C has a wet-bulb temperature of 18C. Using the psychrometric chart, determine a) the relative humidity, b) the humidity ratio, c) enthalpy, d) dew-point temperature, and e) water vapor pressure. (ANSWER: 24.2%, 0.0072 kg/kg dry air, 50.6 kJ/kg dry air, 9.1C, 1.15 kPa)

Acompressor compresses a gas, a pump compresses a liquid. for a given pressure ratio, why does it take more work to compress a gas in a compressor than a liquid in a pump? a)- for a given pressure ratio the average specific volume for a gas is much higher than the average specific volume for a liquid. b)- there is no difference. the only difference is the amount of heat generated (not work) c)- for a given pressure ratio the average volurge for a gas is much higher than the average volume for a liquid. d)-there is no difference