The amount of heat needed to raise 50 g of a substance by 20°C is 325 J. What is the specific heat of the substance? Use the equation C = q/mΔT.

The formula for calculating the specific heat of a substance(c) is:

c=q/mΔt;

Explanation:

Specific heat(c)=the amount of heat per unit mass required to raise the temperatueby one degree celsius is called specific heat.

c=q/mΔt;

where q=heat of substance

m=mass of substance

Δt=temperature of substance

Given;

heat of  substance(q)=325J

mass of substance(m)=50g=0.050kg

temperature(Δt)=20°C

To solve:

specific heat of a substance

we know,

c=q/mΔt

c=

c=2.218J/kgK

∴the specific heat of a substance(c) is 2.218J/kgK

a chemical change results in a new substance being formed; whereas a physical change will result in a different state of matter

explanation: