Heat transfer from gas to gas?

In summary, the conversation discusses the concept of heat transfer from a fixed volume of gas that is released into a sealed room. It is mentioned that the initial temperatures and pressures of the two gasses are different, but the system eventually reaches thermal equilibrium. The ideal gas equation of state can be used as a first approximation to calculate the heat transfer in this scenario.
  • #1
macrossvf
1
0
I am wondering if there is any way or formula to find Heat transfer from a fix volume of gas that is release into a sealed room.

Eg. 1m^3 of 37 degree gas is released into a 100m^3 room which has a temperature of 28 degree. What is the heat transfer from the released gas?
 
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  • #2
Welcome to PF;
This is the classic - 2 gasses are in adjacent thermally insulated containers, they are initially at thermal equilibrium with themselves, and the wall between them is removed.

In your example, the pressures are initially equal, but the temperatures are different, and the volumes are very different. You don't specify what the gasses are.

You should realize that the cylinder becomes part of the room the second the two are connected, and if no heat leaves the system (cylinder + room) then the amount of heat in the system remains the same.

Over a long time the system returns to thermal equilibrium ... so the heat is spread evenly between the two parts. For a first approximation - I'd just use the ideal gas equation of state.
 

FAQ: Heat transfer from gas to gas?

1. How does heat transfer occur between two gases?

Heat transfer between gases occurs through conduction, convection, and radiation. In conduction, heat is transferred through direct contact between the molecules of two gases. In convection, heat is transferred through the movement of the gases themselves. Radiation occurs when heat is transferred through electromagnetic waves between the two gases.

2. What factors affect the rate of heat transfer between gases?

The rate of heat transfer between gases is affected by the temperature difference between the two gases, the surface area of contact, the type of gas, and the distance between the two gases.

3. How does the type of gas affect the rate of heat transfer?

The rate of heat transfer is affected by the specific heat capacity and thermal conductivity of the gas. Gases with higher specific heat capacity and thermal conductivity will transfer heat at a faster rate.

4. What is the difference between heat transfer in a gas and a solid?

In a gas, heat is transferred through conduction, convection, and radiation, while in a solid, heat is primarily transferred through conduction. Gases also have a lower thermal conductivity compared to solids, resulting in slower heat transfer rates.

5. How is heat transfer between gases measured?

Heat transfer between gases is measured through the use of thermometers, heat flux sensors, and thermal imaging cameras. These tools can measure the temperature difference between the two gases and the rate of heat transfer, providing valuable data for studying heat transfer in gases.

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