Question

If 75 g of liquid water ( C = 4.18 j/g C ) in a calorimeter changes temperature from 25 C to 75 C, how much heat was transferred

Answer 1

The heat transferred is 157 kJ.

Explanation:

Given : If 75 g of liquid water ( C = 4.18 j/g C ) in a calorimeter changes temperature from 25 C to 75 C.

To find: How much heat was transferred ?

Solution :

Using the formula,
`q=mc\triangle T`

Where,

q - heat absorbed

c - the specific heat of the substance, in your case of water

ΔT - the change in temperature, as the difference between the final temperature and the initial temperature.

We have given,

c=4.18 j/g C

m=75 g

ΔT= 75 C-25 C=50 C

Substitute the values in the formula,

`q=(75)(4.18)(50)`

`q=157 kJ`

Therefore, The heat transferred is 157 kJ.

Answer 2

The answer is 157kJ

formula: q=mcT

q= 75 g x 4.18 J/goC x 50 oC
q= 157 kJ