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Ideal Gas Internal Energy Change and Heat Capacity Calculator

ΔU = n·Cv·ΔT; Cp = Cv + R for ideal gas.

Calculates the change in internal energy ΔU = n·Cv·ΔT and enthalpy change ΔH = n·Cp·ΔT for an ideal monatomic (Cv = 3R/2) or diatomic (Cv = 5R/2) gas.

Daniel Oh By Daniel Oh
Published Last reviewed 1 min read

Inputs

mol
K

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

ΔU = n·Cv·ΔT; ΔH = n·Cp·ΔT

In depth

Calculates the change in internal energy ΔU = n·Cv·ΔT and enthalpy change ΔH = n·Cp·ΔT for an ideal monatomic (Cv = 3R/2) or diatomic (Cv = 5R/2) gas.