# How much heat is required to raise the temperature of 150g of iron 20c to 25c?(specific heat of iron =480j/kg.c)

Feb 26, 2018

$300 \text{J}$ of energy.

#### Explanation:

The formula for specific heat is:

$E = m c \theta$, where:

$E$ is the energy needed in joules,

$m$ is the mass in kilograms,

$c$ is the specific heat,

$\theta$ is the change in temperature, Celsius of Kelvin doesn't matter.

Here,

$m = 0.125 \text{kg}$

$c = 480 \text{J/kg"^@"C}$

$\theta = {5}^{\circ} \text{C}$, and inputting:

$E = 0.125 \cdot 480 \cdot 5$

$E = 300 \text{J}$ of energy is needed.