How many calories are needed to change 18.2 g of water from 25.2°C. to 67.4 °C.?

Q = 0.768 calorie

Explanation:

Given that,

Mass of water, m = 18.2g

The temperature changes from 25.2°C to 67.4 °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 :

We know that, 1 calorie = 4184 J

or

1 J = (1/4184) calories

t means,

So, the required heat needed is 0.768 cal.

So, 0.768 calorie of heat is needed.

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