Which thermodynamics variable is defined by first law of thermodynamics?

The variables which determines the thermodynamic behaviour of a system are called thermodynamic variables. Pick out the one which is NOT a thermodynamic variable.(temparature, pressure, work, volume)

Which of the following represents the first law of thermodynamics?(1) ΔU=q+w (2)ΔH=q+W, (3) Δ U=H+pΔV (4) ΔU=pΔV

Write the mathematical expression of First Law of thermodynamics.

Thermodynamics deals with energy changes of macroscopic system. a) Consider a chemical reaction taking place in a closed insulated vessel. To which type of thermodynamic system does it belong? b) State the first law of thermodynamics. c) 3 mol of an ideal gas at 1.5 atm and 25^oC expands isothermally in a reversible manner to twice its original volume against an external pressure of 1 atm. Calculate the work done. [R = 8.314 JK^-1mol^-1]

Explain the importance of third law of thermodynamics.

What is thermodynamic scale of temperature ?

The variables which determines the thermodynamic behaviour of a system are called thermodynamic variables. Gases have two specific heat capacities, C_p and C_v . Why?