The volume of the room is 60 m3. What amount of heat is needed to measure the air temperature

The volume of the room is 60 m3. What amount of heat is needed to measure the air temperature in it from 10 to 20 degrees?

Given:

V = 60 m ^ 3 – the volume of the room filled with air;

ro = 1.3 kg / m ^ 3 – air density;

T1 = 10 degrees Celsius;

T2 = 20 degrees Celsius;

c = 1000 J / (kg * C) – specific heat capacity of air.

It is required to determine the amount of energy Q (Joule) required to heat the room from temperature T1 to T2.

Q = c * m * dT = c * V * ro * (T2 – T1) = 1000 * 60 * 1.3 * (20 -10) =

= 1000 * 60 * 1.3 * 10 = 780,000 Joules = 780 kJ.

Answer: in order to heat a room, it is necessary to expend energy equal to 780 kJ.