Question

The latent heat of vaporization for ethyl alcohol is 854 J/g. The amount of energy, rounded to the nearest whole number, needed to change 5.20 grams of ethyl alcohol from a liquid to a gas is J.

Answer 1

Answer:

4441 J

Explanation:

The amount of energy needed to change the ethyl alcohol from liquid to gas state is given by

$Q=m \lambda_v$

where

m = 5.20 g is the mass of the alcohol

$\lambda_v = 854 J/g$ is the latent heat of vaporization of the substance

Substituting the numbers into the formula, we find:

$Q=(5.20 g)(854 J/g)=4,441 J$