Question

How much heat is needed to raise the temperature by 10 0C of 5 kg of a substance of specific heat capacity 300 J/ (kg 0C)?

Answer 1

`15000` joules.

Explanation:

I assume you mean to raise the temperature of the substance by `10^@"C"`.

We use the specific heat formula, which states that,

`q=mcDeltaT`

where:

• `q` is the heat energy supplied in joules

• `m` is the mass of the substance

• `c` is the specific heat capacity of the substance

• `DeltaT` is the change in temperature

So, we have:

`q=5color(red)cancelcolor(black)"kg"*(300 \ "J")/(color(red)cancelcolor(black)"kg"color(red)cancelcolor(black)(""^@"C"))*10color(red)cancelcolor(black)(""^@"C")`

`=15000 \ "J"`