Question

Calculate the quantity of heat in joules required to completely vaporize 100 grams of H2O() at 100.°C and 1.0 atm.

Answer 1

The quantity of heat : 226,000 J

Further explanation

Heat can be calculated using the formula:

Q = mc∆T

Q = heat, J

m = mass, g

c = specific heat, joules / g ° C

∆T = temperature difference, ° C / K

Also can be formulated :

Q = m. Hf

Hf = heat of fusion

Heat required for vaporize /evaporated can be calculated from

Q = m . Hv

m = mass, g

Hv = the heat of vaporization, for water = 2,260 J/g

So :

`\tt Q=100* 2,260=226,000 J`