Ethylene dichloride is an effective cooling agent when allowed to evaporate. The heat of vaporization is 85.3 cal/g. How much heat could be removed from the skin if 4.25g of ethylene dichloride were sprayed on and allowed to evaporate?

Question

Quizplus · Accepted Answer

First, we need to calculate the total amount of heat that could be removed by the evaporation of ethylene dichloride. The formula for heat (q) is:
q = m x ΔHvap
where m is the mass of ethylene dichloride and ΔHvap is the heat of vaporization.

Plugging in the values:
q = 4.25 g x 85.3 cal/g = 362.725 cal

Therefore, the amount of heat that could be removed from the skin is 362.725 cal, which is option B.

Ethylene Dichloride Is an Effective Cooling Agent When Allowed to Evaporate