Question

How much heat do you need to raise the temperature of 150 g of ice from −30 °C to −15 °C ?

Answer 1

Answer : The amount of heat needed is, 9405 J

Explanation :

Formula used :

`Q=m* c* \Delta T`

or,

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

where,

Q = heat required = ?

m = mass of ice = 150 g

c = specific heat of water =
`4.18J/g^oC`

`T_1` = initial temperature =
`-30^oC`

`T_2` = final temperature =
`-15^oC`

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

`q=150g* 4.18J/g^oC* [(-15)-(-30)]^oC`

`q=9405J`

Therefore, the amount of heat needed is, 9405 J