Compressed air can be pumped underground into huge caverns as a form of energy storage. The volume of a cavern is 6.3 x 105 m³, and the pressure of the air in it is 7.4 x 106 Pa. Assume that air is a diatomic ideal gas whose internal energy U is given by U = nRT. If one home uses 30.0 kWh of energy per day, how many homes could this internal energy serve for one day?

A gas expands from I to F in the figure below. The energy added to the gas by heat is 212 J when the gas goes from I to F along the diagonal path. Three paths are plotted on a PV diagram, which has a horizontal axis labeled V (liters), and a vertical axis labeled P (atm). The green path starts at point I (2,4), extends vertically down to point B (2,1), then extends horizontally to point F (4,1). The blue path starts at point I (2,4), and extends down and to the right to end at point F (4,1). The orange path starts at point I (2,4), extends horizontally to the right to point A (4,4), then extends vertically down to end at point F (4,1). (a) What is the change in internal energy of the gas? Use the relations between various features of the graph and the work done on the gas to find the energy added by work and then use your result to find the change in internal energy of the gas. J(b) How much energy must be added to the gas by heat for the indirect path IAF to give the same change in…

An ideal gas of 20 moles expands isothermally at temperature T= 90°C. The final volume is 5 times its initial volume. What is the heat flow into the gas in units of kJ? The universal gas constant R is 8.32 J/(mol·K).

Estilos Edición P5. A rigid container contains water vapor at 250°C and an unknown pressure. When the container cools to 150°C, the vapor begins to condense. Estimate the initial pressure in the container. Plot the thermodynamic process on a phase diagram. Answer: 600 kPa.

One gram of water is vaporized into 1.65×103 cm3 when boiled at a constant pressure of 1.013×105⁢P⁢a. If the heat of vaporization at this pressure is Lv=2.256×106⁢J/k⁢g, what is the work done by the water when it vaporizes?

A sealed cylinder has a piston and contains 8.90×103 cm3 of an ideal gas at a pressure of 7.50 atm. Heat is slowly introduced, and the gas isothermally expands to 1.70×104 cm3. How much work ? does the gas do on the piston?

64870 J of heat is added to a gas at a constant pressure of 1.75 x 105 Pa This causes a change in internal energy of 2570 J. If the starting volume is .864 m3, what is the final volume?