Thermodynamcics Definition and 55 Threads

Homework Statement Water is contained in a cylinder fitted with a frictionless piston (figure shows that atmospheric pressure acts on piston from above). The mass of the water is 0.45 kg, and the piston area is 0.186 m2. Initially, the water conditions are 110oC and 90% dryness fraction, and...

I don't understand how compression of a gas causes heat to flow out of the container of that gas... Could someone please help? Thank you in advance!

qrev/T = ΔS here what does ΔS signify?does it mean change in entropy of system or surroundings? how is entropy of system,surrounding and universe related to each other and which entropy is used in gibbs free energy equation?

Homework Statement Hi ! I'm stuck with these two questions of my assignment of thermodynamics - Give two exemples of irreversible process (initial state, process, final state) - For each of them, explain why they are irreversible on the microscopic scale. Homework Equations We are not asked...

[SIZE="3"]In a question He gives that : 0.1 kg of water contained in cylinder-piston device . Water is initially at 1.5 bar and 403 k (Kelvin). More 0.1 kg of water at 2 bar and 403 kelvin is admitted to the cylinder. Through out this filling process, pressure and temperature of cylinder...