What is a state function?

• used to determine heat changes
• whose value is independent of path
• used to determine pressure volume work
• whose value depends on temperature only

What is reversible process in thermodynamics?

Define irreversible change.

15. Name the variable that is kept constant in isochoric process and isobaric process.

Give one difference between an isothermal and an adiabatic process.

• ∆T = 0
• ∆p = 0
• q = 0
• w = 0

Define internal energy of a system

Define enthalpy.

Why is enthalpy considered more useful than internal energy in chemical reactions?