Question

The specific heat of copper is 0.40 joules/ g °c. How much heat is needed in joules to change the temperature of a 55 gram substance from 20.0 ° C to 74.0 °C ? c=.40 J/g °C.

I need it worked out pleaseee

Answer 1

Answer : The amount of heat needed is, 1188 J

Explanation :

Formula used :

`q=m* c* (T_2-T_1)`

where,

q = heat needed = ?

m = mass of copper = 55 g

c = specific heat capacity of copper =
`0.40J/g^oC`

`T_1` = initial temperature =
`20.0^oC`

`T_2` = final temperature =
`74.0^oC`

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

`q=55g* 0.40J/g^oC* (74.0-20.0)^oC`

`q=1188J`

Thus, the amount of heat needed is, 1188 J