Air in the amount of 2 lbm is contained in a wellinsulated, rigid vessel equipped with a stirring paddle wheel. The initial state of this air is 30 psia and 60°F. How much work, in Btu, must be transferred to the air with the paddle wheel to raise the air pressure to 40 psia? Also, what is the final temperature of air?

Hi please help: a bubble with original volume 2.5 cm^3 rises from the bottom of a lake to the surface where it grows to a volume of 5.9cm^3 at a pressure of 1.0 atm. Gas molecules were absorbed by the water as the bubble rose so that only 82% of the original gas is in the 5.9 cm^3 bubble at the surface. The temperature at the bottom is 8.2 degrees Celsius and the temperature at the surface is 23.4 degrees Celsius.  Find the pressure at the bottom of the lake (in atm). Use 3 significant figures

A cryogenic vacuum pump works by condensing vapors onto some absorbent medium. This is an efficient and clean way to pump a system in a research environment. The term cryo means cold, which indicates that these types of vacuum pumps contain a refrigerant cycle to cool the internal parts. The temperature difference between the inside and outside of a typical cryogenic pump is Δ?=303 ∘CΔT=303 ∘C. Derive an expression to convert this difference into Fahrenheit and express the answer.

A jet of steam at 100°C is applied to a 2.00 kg block of ice at 0°C. How many grams of steam would be required to completely melt the ice assuming a complete transfer of thermal energy? nA d bloow olle boutaig erd 15000 lo yolla an ai e W lobin bna 1900 lo yolla ns e losbinom 4