The image above represents total latent heat.

To compute for total latent heat, three essential parameters are needed and these parameters are **Density of Solidifying Metal (ρ’), Volume of Casting** **(V)** and **Latent Heat of Fusion (H _{f}).**

The formula for calculating the total latent heat:

Q = ρ’VH_{f}

Where:

Q = Total Latent Heat

ρ = Density of Solidifying Metal

V = Volume of Casting

H_{f} = Latent Heat of Fusion

Let’s solve an example;

Find the total latent heat when the density of solidifying metal is 12, the volume of casting is 14 and the latent heat of fusion is 10.

This implies that;

ρ = Density of Solidifying Metal = 12

V = Volume of Casting = 14

H_{f} = Latent Heat of Fusion = 10

Q = ρ’VH_{f}

Q = (12)(14)(10)

Q = 1680

Therefore, the **total latent heat **is **1680 J/Kg.**

**Calculating the Density of Solidifying Metal when the Total Latent Heat, the Volume of Casting and the Latent Heat of Fusion is Given.**

ρ = ^{Q} / _{VH}_{f}

Where;

ρ = Density of Solidifying Metal

Q = Total Latent Heat

V = Volume of Casting

H_{f} = Latent Heat of Fusion

Let’s solve an example;

Find the density of solidifying metal when the total latent heat is 20, the volume of casting is 4 and the latent heat of fusion is 2.

This implies that;

Q = Total Latent Heat = 20

V = Volume of Casting = 4

H_{f} = Latent Heat of Fusion = 2

ρ = ^{Q} / _{VH}_{f}

ρ = ^{20} / _{(4)(2)}

ρ = ^{20} / _{8}

ρ = 2.5

Therefore, the **density of solidifying metal **is **2.5**

Continue reading How to Calculate and Solve for Total Latent Heat | Solidification of Metals