Calculate the heat in kilojoules needed to condense 185g of steam at 100 ∘C.

Answer 1

To do this, you need the the latent heat of vaporization (Lv) for water.
In references, the Lv for water is 2256 J/g.
The formula for the heat released of absorbed is
Q = m * Lv
where
m = mass
Lv = heat of vaporization
In this case, heat is released (negative Q) because the steam is condensed.
Substituting,
Q = 185 * 2256
Q = ?

Now solve for Q. Units are in J so divide it by 1000 to convert it to kJ.

Hope this helps :3