Question

insulated box of air at temperature T, is dropped from height H, what is the temperature of the air inside box on the ground?

Answer 1

Explanation:

Thermal insulation is the reduction of heat transfer (i.e., the transfer of thermal energy between objects of differing temperature) between objects in thermal contact or in range of radiative influence. Thermal insulation can be achieved with specially engineered methods or processes, as well as with suitable object shapes and materials.

Thermal insulation is the reduction of heat transfer (i.e., the transfer of thermal energy between objects of differing temperature) between objects in thermal contact or in range of radiative influence. Thermal insulation can be achieved with specially engineered methods or processes, as well as with suitable object shapes and materials.Heat flow is an inevitable consequence of contact between objects of different temperature. Thermal insulation provides a region of insulation in which thermal conduction is reduced or thermal radiation is reflected rather than absorbed by the lower-temperature body.

Answer 2

Answer:

Energy of the system (E)=Internal energy

(U)+PEsystem+KEsystem,

ΔE=ΔU+ΔPE+ΔKE,

The condition for ΔE=ΔU is ΔPE=ΔKE=0.

The first law of thermodynamics gives us the relation between the change in energy of the system and heat and work.

ΔE+PdV=Q,

ΔU+ΔPE+PdV=Q(1)

In your question, ΔPE=−mgh and PdV=0 (as dV=0).

Your equation is correct.