Question

How much heat must be added to 1 gram of water at 1°C to raise its temperature to 101°C?

A. 100 calories
B. 540 calories
C. 770 calories
D. 640 calories ​

Answer 1

The amount of heat required to raise the temperature of a substance can be calculated using the formula:

Q = m * c * ΔT

where Q is the amount of heat, m is the mass of the substance, c is the specific heat capacity of the substance, and ΔT is the change in temperature.

For water, the specific heat capacity is 1 calorie/gram °C.

So for 1 gram of water, the amount of heat required to raise its temperature by 1°C is:

Q = 1 * 1 * 1 = 1 calorie

To raise the temperature from 1°C to 101°C, the temperature change is:

ΔT = 101°C - 1°C = 100°C

So the total amount of heat required is:

Q = 1 * 1 * 100 = 100 calories

Therefore, the correct answer is A. 100 calories.