Final answer:
The temperature difference in Kelvin (ΔT) between the interior of the house at 20.5°C and the ground temperature of the slab at 6.4°C is 14.1 K, using the fact that the scale difference between Celsius and Kelvin is the same.
Step-by-step explanation:
The student has asked to calculate the temperature difference in Kelvin for a house built on a concrete slab with known dimensions and thermal conductivity, considering different interior and ground temperatures. To find the temperature difference (ΔT) in Kelvin, we can simply subtract the ground temperature from the interior temperature of the house, as both Celsius and Kelvin have the same increment size.
To calculate: ΔT = T_{interior} - T_{ground}
ΔT = 20.5°C - 6.4°C
ΔT = 14.1 K (since 1°C = 1 K in temperature difference)
The temperature difference in Kelvin between the interior of the house and the ground temperature of the slab is 14.1 K.