An air-water vapor mixture going to a drying process has a dry bulb temperature of 57.2 °C and a humidity of 0.030 kg H2O/kg dry air. Using the humidity chart and appropriate equations, determine the percentage humidity, saturation humidity at 57.2 °C, dew point, humid heat, and humid volume.

A rectifying column consists of a tube arranged vertically and supplied at the bottom with a mixture of benzene and toluene as vapor. At the top, a condenser returns some of the product as a reflux which flows in a thin film down the inner wall of the tube. At one point in the column, the vapor contains 60 mol% benzene and the adjacent liquid reflux contains 51 mol% benzene. The temperature at this point is 92°C. Assuming the diffusional resistance to vapor transfer to be equivalent to the diffusional resistance of a štagnant vapor layer 0.5 mm thick, calculate the rate of interchange of benzene and toluene between vapor and liquid. The molar latent heats of the two materials can be taken as equal. The vapour pressure of toluene at 92°C is 44.0 kN/m2 and the diffusivity of the vapors is 0.053 cm?/s.

METAL Suppose you heat a metal object with a mass of 32.9 g to 96.6 °C and transfer it to a calorimeter containing 100.0 g of water at 17.2 °C. The water and metal reach a final temperature of 22.4 °C. What is the specific heat of the metal in J/g-°C?

17D.2. When a sample of gold iscooled from 32.5 °C to 20.0 °C,9.46 J of heat are liberated. What isthe mass of the sample if the specificheat of gold is 0.129 J/g·°C?