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Heat energy from mass and temperature change

Calculate the heat energy needed for a temperature change at constant specific heat capacity.

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01

Your inputs

The starting values are an example.

4,180 J/(kg·K) is a rounded example value for liquid water.

Decimals: 12.5 · Thousands: 1,234.56. Follow the field instructions for lists.

02

Your result

Enter your values and select Calculate.

Your calculation will appear here.

Your result will include the relevant values and units.

Understand the calculation

Formula and example

How it is calculated

Q = m × c × ΔT

Worked example

1 kg with c = 4,180 J/(kg·K) needs 83.6 kJ for a temperature rise of 20 K.

Things to check

  • A negative temperature change gives negative heat energy: the system releases energy.
  • Melting, evaporation and heat losses are separate processes excluded from this calculation.