I have two problems and i need help please.. First one: A mass of 0.05KG of the air is heated at constant pressure of 2 bar until the volume is occupied is 0.0658 m^3. Calculate the supplied heat and the workdone if the initially temperature of the air is 130 C.?

The second and the last one: 1 KG of nitrogen is compressed reversibly and isothermally from 1.01 bar, 20 C to 4.2 bar. Calculate the workdone and the heat Flow during the process Assuming nitrogen to be a perfect gas and molar mass 28kg/kmol

Could someone . i have tried to solve myself but my calculation is off

What are similarities and differences of reflection, refraction, diffraction and absorption?

Two manned satellites approaching one another at a relative speed of 0.550 m/s intend to dock. the first has a mass of 2.50 ✕ 103 kg, and the second a mass of 7.50 ✕ 103 kg. assume that the positive direction is directed from the second satellite towards the first satellite. (a) calculate the final velocity after docking, in the frame of reference in which the first satellite was originally at rest.(b) what is the loss of kinetic energy in this inelastic collision? (c) repeat both parts, in the frame of reference in which the second satellite was originally at rest. final velocity(d) loss of kinetic energy = ?