Question 416: Thermodynamics & KTG

Question

A heat source at T = 10
3
K is connected to another heat reservoir at T = 10
2
K by a copper slab which is 1 mthick. Given that the thermal conductivity of copper is 0.1 WK
–1
m
–1
, the energy flux through it in the steady state is -

Accepted Answer

$$\left( {{{dQ} \over {dt}}} \right) = {{kA\Delta T} \over \ell }$$
$$ \Rightarrow $$  $${1 \over A}\left( {{{dQ} \over {dt}}} \right) = {{\left( {0.1} \right)\left( {900} \right)} \over 1} = 90W/{m^2}$$

Answer

200 Wm
$$-$$2

Answer

65  Wm
$$-$$2

Answer

120 Wm
$$-$$2

Answer

90 Wm
$$-$$2

Thermodynamics & KTG

A heat source at T = 10 3 K is connected to another heat reservoir at T = 10 2 K by a copper slab which is 1 mthick. Given that the thermal conductivity of copper is 0.1 WK –1 m –1 , the energy flux through it in the steady state is -

Choose the correct answer: