Also use the expression to calculate the density ρ at z = 0 and z = 1000 m and Calculate the number of air molecules per m3 at z = 1000 m.

The air in a tank is pressurized to 640 mm Hg at a temperature of 23C. If the tank is pressurized to a higher pressure of 800 mm Hg, what us the new temperature in degrees Kevlin?

A spherical balloon filled with H2 gas to a volume of 3.35x10-2 m3 at 17 °C is carefully lowered into the sea to a depth of 50 m, where the seawater temperature is about 12 °C.  Assume the gas is always in thermal equilibrium with the surrounding seawater.  The atmospheric pressure at the surface is P0 = 1.013 x 105 N/m2 and the specific gravity of the seawater is 1.03.      What is the change in thermal energy of the gas from surface to 50 m below?

Can you please help me answer this?

Can you please help me answer this?

Letters G and H

2.5kg of saturated steam at 2.87MPa, expand isometrically until its temperature increased to 400°C. Calculate dH, dU, dS, Wsf, and Q.

Given the following property data for H,0 designate the region in T-v or P-v space (i.e., compressed liquid, liquid-vapor mixture, superheated vapor, etc.) and find the value(s) of the requested property or properties. Use the tables in Appendix D or the NIST database as necessary. Provide units with your answers.