Final answer:
The approximate change in thermal energy of the air when it warms from 15°C to 20°C is 363,600 J.
Step-by-step explanation:
To calculate the change in thermal energy of the air, we can use the equation Q = mcΔT, where Q is the thermal energy, m is the mass of the air, c is the specific heat, and ΔT is the change in temperature.
Given that the mass of the air is 72 kg, the specific heat is 1010 J/(kg·°C), and the temperature change is 20°C - 15°C = 5°C, we can substitute these values into the equation:
Q = (72 kg)(1010 J/(kg·°C))(5°C) = 363,600 J
Therefore, the approximate change in thermal energy of the air when it warms from 15°C to 20°C is 363,600 J.