Question

A 5.0 g of copper was heated from 20°C to 80°C. How much energy was used to heat Cu? The specific heat of copper is 0.385 J/gC.

Answer 1

Answer: a. 115.5 J.

Explanation:

$Q=mc\Delta T$

where,

Q = heat absorbed = ?

m = Mass of copper = 5.0 g

c = specific heat capacity of copper= 0.385 J/g.°C

$\Delta T$ = change in temperature = $T_2-T_1=(80^0C-20^oC)=60^0C$

Putting values in above equation, we get:

$Q=5.0g\times 0.385J/g.^oC\times 60^0C$

$Q=115.5Joules$

Hence, the energy used to heat Copper is 115.5 Joules.