According to first law of thermodynamics, q= ΔU + PΔV If the process is carried out at constant volume , ΔV=0 qv = ΔU where v indicates constant volume. Internal energy change is the heat absorbed or evolved at constant volume. ΔU is a state function, therefore qv ,is also a state function. If the process is carried out at constant pressure, the work of … [Read more...] about Enthalpy
internal energy change
Internal Energy
Internal Energy Whenever some process occur ,it is usually accompanied by some energy change. The energy may appear in different forms such as heat, light, work. The evolution or absorption of energy in different processes shows that every substance must be associated with some definite amount of energy ,the actual value of which depends upon the nature of the substance … [Read more...] about Internal Energy