The figure shows the cross section of a wall made of three layers. The thicknesses of the layers are L1, L2 =0.800 L1, and L3 = 0.250 L1. The thermal conductivities are k1, k2 = 0.880 k1, and k3 = 0.660 k1. The temperatures at the left and right sides of the wall are TH = 22˚C and TC = -15 ˚C, respectively. Thermal conduction is steady. (a) What is the temperature difference ΔT2 across layer 2 (between the left and right sides of the layer)? If k2 were, instead, equal to 1.140 k1, (b) would the rate at which energy is conducted through the wall be greater than, less than, or the same as previously, and (c) what would be the value of ΔT2?

The figure shows the cross section of a wall made of three layers. The thicknesses of the layers are L1, L2 =0.800 L1, and L3 = 0.250 L1. The thermal conductivities are k1, k2 = 0.880 k1, and k3 = 0.660 k1. The temperatures at the left and right sides of the wall are TH = 22˚C and TC = -15 ˚C, respectively. Thermal conduction is steady. (a) What is the temperature difference ΔT2 across layer 2 (between the left and right sides of the layer)? If k2 were, instead, equal to 1.140 k1, (b) would the rate at which energy is conducted through the wall be greater than, less than, or the same as previously, and (c) what would be the value of ΔT2?