Question

How many joules are needed to change 15.4 g of water from 22.2°C. to 25.6 °C.?

Answer 1

Q = 219.07 J

Step-by-step explanation:

Given that,

Mass of water, m = 15.4 g

The temperature changes from 22.2°C. to 25.6 °C.

The specific heat of water, c = 4.184 J/g °C

We need to find the heat needed to change in temperature. The formula is given by :

`Q=mc\Delta T\\\\Q=15.4* 4.184* (25.6-22.2)\\\\Q=219.07\ J`

So, 219.07 J of heat is needed.