How much energy is required to change the temperature 0f 150

How much energy is required to change the temperature 0f 15.0g of Fe from 18.5 degrees celcius to 56.8 degrees celcius? The specific heat of iron is .451J/g degrees celcius.

Solution

Answer:

Heat or energy q=m x c x deltaT=m x c x (T2-T1)

Where m=mass of substance, c= specific heat and delta T= change in temperature=T2-T1

Given m=15 g, c=0.451 J/g.°C, T1=18.5°C and T2=56.8°C

Threfore Energy=15g x 0.451 J/g.°C x (56.8°C-18.5°C)

Energy=259 J.