Question

How much energy must be removed from 13.9 grams of gaseous oxygen in order to decrease the temperature from 38.8°C to 23.8°C? The specific heat of oxygen is 0.219 cal/g °C. in cal

Answer 1

So,

To solve this question, we could use the equation:

What we're going to do now is to replace the values that we know:

The negative sign of the result indicates that this heat will be lost.

Therefore, the amount of energy that must be removed, equals 45.6615 cal.