Question

Calculate the mass of water that can be vaporized with 1250 calories of energy.

Answer 1

Answer:

2.31 g

Explanation:

Step 1: Given data

• Energy added to vaporize the water (Q): 1250 cal

• Standard enthalpy of vaporization of water (ΔH°vap): 540 cal/g

• Mass of water (m): ?

Step 2: Calculate the mass of water that can be vaporized with 1250 calories of energy

We will use the following expression.

Q = ΔH°vap × m

m = Q/ΔH°vap

m = 1250 cal/(540 cal/g)

m = 2.31 g