Question

What mass of water needs 5023 joules of heat to vaporize? Hv=2260 J/g

Answer 1

In order to calculate the mass, we can use the formula below:

$Q=m\cdot H_V$

Where Q is the heat energy, m is the mass and HV is the latent heatof pvaporizaion.

Since the latent heat is given in J/g, themas s will be used in g and the energy in J.

So we have:

$\begin{gathered} 5023=m\cdot2260\\ \\ m=\frac{5023}{2260}\\ \\ m=2.22\text{ g} \end{gathered}$

Therefore the mass is 2.22 grams.