Latent heat is the amount of heat energy required to change the state of a substance without changing its temperature. This energy is absorbed or evolved in the phase changes like melting, freezing, boiling, or condensation.

Formula For Latent Heat

The latent heat formula is given as,

L = Q / M

Where,

Q = quantity of heat
M = mass of the substance

Solved Examples

Problem 1 : Find the latent heat of 5 kg material when the amount of heat for a change of phase is 400 k.cal.

Solution:

Given,

Q = 400 k.cal M = 5 kg

The formula of latent heat is given by,

L = Q / M

L = 400 / 5

L = 80 k.cal/kg

Problem 2: The heat required for a phase change of 2 kg substance is 300k. cal. Find its latent heat.

Solution:

Given,

Q = 300 k. cal

M = 2 kg

The formula for latent heat is given as,

L = Q / M

L = 300 / 2

L = 150 k.cal/kg

Other Related Sections

Admissions Open for

Latent Heat Formula

Definition of Latent Heat

Formula For Latent Heat

The latent heat formula is given as,

L = Q / M

Where,

Q = quantity of heat
M = mass of the substance

Solved Examples

Problem 1 : Find the latent heat of 5 kg material when the amount of heat for a change of phase is 400 k.cal.

Solution:

Given,

Q = 400 k.cal M = 5 kg

The formula of latent heat is given by,

L = Q / M

L = 400 / 5

L = 80 k.cal/kg

Problem 2: The heat required for a phase change of 2 kg substance is 300k. cal. Find its latent heat.

Solution:

Given,

Q = 300 k. cal

M = 2 kg

The formula for latent heat is given as,

L = Q / M

L = 300 / 2

L = 150 k.cal/kg

Other Related Sections

List of Physics Formulas

Admissions Open for

Frequently Asked Questions

Ptolemy’s Theorem

Formula: Ptolemy’s Theorem relates the sides and diagonals of a cyclic quadrilateral. For a cyclic quadrilateral ABCD with diagonals AC and BD, the theorem states:

CBSE Schools In Popular Cities

We are also listed in

ORCHIDS - The International School |

Terms|

Cancellation