Question

The brick wall (of thermal conductivity
0.8 W/m ·
◦
C) of a building has dimensions
of 5.2 m by 8 m and is 20 cm thick.
How much heat flows through the wall in
a 17.7 h period when the average inside and
outside temperatures are, respectively, 19
◦
C
and 8
◦
C?
Answer in units of MJ

Answer 1

do you have any equations ?

Answer 2

first find delta T (diff ofoutside and inside temp)
then find Area and use the standard equation for Heat flow