☰
✕

Thermodynamics
Question
Wired Faculty App

Consider the reaction: N2 +3H2 → 2NH3 carried out at constant temperature and pressure. If ∆H and ∆U are the enthalpy and internal energy changes for the reaction, which of the following expressions is true? 

  • ∆H = 0

  • ∆H = ∆U

  • ∆H < ∆U

  • ∆H >∆U

Answer

C.

∆H < ∆U

∆H = ∆U + ∆nRT
∆n = -2
∆H = ∆U - 2RT
∆H < ∆U

Sponsor Area

Some More Questions From Thermodynamics Chapter

Define an isolated system.

Define intensive properties.

Define extensive properties.

Why all living systems need to be 'open systems'?

Define state variables of a system.

From thermodynamic point of view, to which system the animals and plants belong?

What is a state function?

A thermodynamic state function is a quantity

What is reversible process in thermodynamics?

Define irreversible change.