Answer: The heat energy absorbed by glass window is 84420 J.
Step-by-step explanation:
Given: Mass = 15 kg (1 kg = 1000 g) = 15000 g
Initial temperature =

Final temperature =

Specific heat capacity =

Formula used is as follows.

where,
q = heat energy
m = mass of substance
C = specific heat capacity
= initial temperature
= final temperature
Substitute the values into above formula as follows.

Thus, we can conclude that the heat energy absorbed by glass window is 84420 J.