Question

How many "big c" calories does it take to raise the temperature of 2.00 l of water from 22.0 c to 40.0 c?

Answer 1

given that

mass of water = 2 L = 2000 gram

now we can use

heat required to raise the temperature

$Q = mC\Delta T$

C = 1 cal/g C

$\Delta T = 40 - 22 = 18$

now from above formula

$Q = 2000* 1 * 18$

$Q = 36000 Cal$

so above is the heat required to raise the temperature