The brick wall (of thermal conductivity

0.41 W/m ·

◦ C) of a building has dimensions

of 5.9 m by 4 m and is 16 cm thick.

How much heat flows through the wall in

a 17.2 h period when the average inside and

outside temperatures are, respectively, 14◦C

and 3◦C?

Answer in units of MJ.

Question

Adrienne Wilkinson

Physics

7 July, 21:23

The brick wall (of thermal conductivity

0.41 W/m ·

◦ C) of a building has dimensions

of 5.9 m by 4 m and is 16 cm thick.

How much heat flows through the wall in

a 17.2 h period when the average inside and

outside temperatures are, respectively, 14◦C

and 3◦C?

Answer in units of MJ.

+2

Answers (1)

Know the Answer?

Buchanan · Answer 1

Answer:0.000665255mj

Explanation:

thermal conductivity (k) = 0.41w/m°C

Area (a) = 5.9x4=23.6m^2

Thickness (t) = 16cm=16/100=0.16m

Change in temperature (T) = 14-3=11°C

Quantity of heat=Q

Q = (kxaxT) ➗ t

Q = (0.41x23.6x11) ➗ 0.16

Q=106.436 ➗ 0.16

Q=665.255j=0.000665255mj

The brick wall (of thermal conductivity0.41 W/m ·◦ C) of a building has dimensionsof 5.9 m by 4 m and is 16 cm thick.How much heat flows through the wall ina 17.2 h period when the average inside andoutside temperatures are, respectively, 14◦Cand 3◦C?Answer in units of MJ.

The brick wall (of thermal conductivity

0.41 W/m ·

◦ C) of a building has dimensions

of 5.9 m by 4 m and is 16 cm thick.

How much heat flows through the wall in

a 17.2 h period when the average inside and

outside temperatures are, respectively, 14◦C

and 3◦C?

Answer in units of MJ.