Three moles of an ideal gas expand isothermally at 400 K to 3.0 times the initial volume. What is the work in J done by the gas if ?

The initial state of 1.00 mol of a dilute gas is P1 = 3.00 atm, V1 = 1.00 L, and Eint 1 = 456 J and its final state is P2 = 2.00 atm, V2 = 3.00 L, and Eint2 = 912 J. The gas is first cooled at constant volume until it reaches its final pressure. It is then allowed to expand at constant pressure until it reaches its final volume. (a) Illustrate this process on a PV diagram and calculate the work done by the gas. (b) Find the heat absorbed by the gas during this process.

A 5-kg block of copper is heated from -100°C to 100°C. Determine the change of internal energy of the block in kJ. Assume that specific heats are evaluated at the average temperature, in °C. Report your answer to the nearest whole number, rounding if necessary.

As shown in the figure below, 0.1 kg of water is contained within a piston- cylinder assembly at 100°C (Sate 1). The piston has a mass of 101.94 kg and is free to move smoothly in the cylinder. Atmospheric pressure, 100 kPa, is acting on the top of the piston. Heat is added in a process until the temperature is 500°C (State 2). Answer the following: (a) Calculate the magnitude and direction of the work and heat transfer in kJ.