Question

The specific heat capacity of copper is 0.09 cal/g°C. How much energy is needed to flow into a 10-gram sample to change its temperature from 20°C to 21°C?

Answer 1

ΔT = 21º C - 20 ºC => 1 º C

Q = m x C x ΔT

Q = 10 x 0.09 x 1

Q = 0.9 Cal

hope this helps!

Answer 2

Answer : The amount energy needed is, 0.9 cal

Solution :

Formula used :

`Q=m* c* \Delta T=m* c* (T_(final)-T_(initial))`

where,

Q = heat required = ?

m = mass of copper = 10 g

c = specific heat of copper =
`0.09cal/g^oC`

`\Delta T=\text{Change in temperature}`

`T_(final)` = final temperature =
`21^oC`

`T_(initial)` = initial temperature =
`20^oC`

Now put all the given values in the above formula, we get :

`Q=10g* 0.09cal/g^oC* (21-20)^oC`

`Q=0.9cal`

Therefore, the amount energy needed is, 0.9 cal