Heat of Vaporization Formula and Sums

Heat of Vaporization Formula :

Heat of vaporization formula is H_v(j/g) in joule per gram is equal to the product of heat q_(j) in joule and divided by the mass of the substance m_(kg)  in kilogram. Hence the Heat vaporization formula can be written as,

H_v(j/g) = q_(j)/m_(kg)

Where,

H_v → vaporization heat in j/g

m→ mass of the substance in kg or g

q→ heat in j

Sample Sums :

Sums 1 :

Calculate the total amount of heat energy that required to vaporize 200 grams of H₂0? in a the heat of vaporization for H₂0 is 3452 J/g.

Solution :

The  heat of vaporization formula

H_v=q/m

q= H_v *m

q=3452 *200

Therefore q= 690400 J

Sum 2:

Calculate the total amount of heat energy that required to vaporize  150 grams of H_{2 .}In  the heat of vaporization for H₂0 is 6000. J/g,

Solution :

The heat of vaporization formula

H_v=q/m

q= H_v *m

q=6000*150

Therefore q= 900000