Prism gas permeation

You place a paper clip in a cup of soda and it sinks. Which is denser? O Paperclip O Soda

Determine the specific molar volume (L/mol) for hydrogen stored at -190 Celsius and 300 atm.

Heat Transfer Question

The chemisorption of hydrogen. H2, on copper powder at 25 oC follows the Langmuir isotherm with a= 3.67 kPa- 1. Calculate the fractional surface coverage if the pressure of hydrogen gas is (a) 20 Pa and (b) 200 Pa.

Estimate the thermal conductivity of benzene at 30C.

2. A piece of beef steak 7 cm thick will be frozen in the freezer room -40 ° C. This product has a moisture content of 73%, a density of 970 kg / m³, and a thermal conductivity (frozen) of 1.1 W / (m K). freezing time using the Plank equation. This product has an initial freezing temperature of -1.75 ° C, and the movement of air in the freezing room gives a convective heat transfer coefficient of 10 W / (m² K).        t f = Answer    hour.

Estimate the thermal conductivity of tomato juice at 35 ° C. (Water content = 87.0% wet basis). Thermal conductivity of material = AnswerW / m ° C

The wavelength of a particular color of yellow light is 593 nm. The energy of this wavelength of light is kJ/photon.

3 A continuous countercurrent adiabatic rotary drier is being designed for the production of 500 lb/h of a product containing 2% moisture from wet crystal containing 30% moisture, wet basis. The air entering the drier will have a dry-bulb temperature of 230°F and a wet-bulb temperature of 102°F. The air leaving the drier will be at a temperature of 115°F. Because of the small size of the crystals, the highest allowable air velocity is 10 lb dry air/ft2-min of drier cross section. Find: a. Dry air required (lb/min) b. Cross-sectional area of the drier c. Length of drier required if the volumetric coefficient of heat transfer is 25 BTU/ft3-h-°F