Question

A sample of  Aluminium requires  4.0 J of energy to change its temp from 25 C to 32 C. What is the mass of the aluminum? Specific heat of Al = 0.89.

Answer 1

$ΔE = mcΔT \\ m = \frac{ΔE}{cΔT} \\ ΔT = 32 -25 = 7 \;ºC \\ m = \frac{4.0}{0.89 \times 7} = 0.64 \;g$

Answer: 0.64 g