Answer:
59.89 KJ
Step-by-step explanation:
Data Given:
mass of H₂O (m) = 26.5 g
heat released (Q) = ?
Solution:
This question is related to the latent heat of condensation.
Latent heat of condensation is the amount of heat released when water vapors condenses to liquid.
Formula used
Q = m x Lc . . . . . (1)
where
Lc = specific latent heat of condensation
Latent heat of vaporization of water is exactly equal to heat of condensation with -ve charge
So, Latent heat of vaporization of water has a constant value
Latent heat of vaporization of water = 2260 J/g
So
Latent heat of condensation of water will be = - 2260 J/g
Put values in eq. 1
Q = (26.5 g) x (- 2260 J/g)
Q = - 59890 J
convert J to kJ
1000 J = 1 KJ
59890 J = 59890 / 1000 = 59.89 KJ
So, 59.89 K of heat will be released. negative sign indicate release of energy for condensation