Question

How much energy is used to heat water from 5*C to 50*C?

Answer 1

Energy required to heat 1.5 kg water from 20 degrees C to 80 degrees C.

Specific heat of water = 1 cal/gram-deg C

1.5 kg = 1,500 grams.

Energy required = 1500 * 60 * 1

= 90,000 calories = 90 kcal.

1 kilocalorie = 4184 joules

Energy required = 90 * 4184

= 376,560 joules = 376.6 kjoules

Answer 2

Explanation:

Explanation:

To calculate the energy required to raise the temperature of any given substance, here's what you require:

The mass of the material,

m

The temperature change that occurs,

Δ

T

The specific heat capacity of the material,

c

(which you can look up). This is the amount of heat required to raise 1 gram of that substance by 1°C.

Here is a source of values of

c

for different substances: