Thermodynamics Question

Why didn't you put all your womework questions in to one thread?

"How much longer will it take a 1 kW electric heater to raise the wall temperature to 20C?"

Congratulations! You have discovered insolubility!

How much longer than what???????????????????????

_{(Stifles urge to vent)}

Eeerr did you mean Insolvability

Unless of course we dissolve the OP

You need the following information:

1. Output of the heater

2. Specific Heat of the atmosphere

3. Specific Heat of the aluminum wall

4. Is the room sealed or is there infiltration or circulation of the atmosphere.

The second law of thermodynamics states that energy flows naturally from a higher level to a lower level. Physics does not lie! So you see how difficult a simple answer can be.

Calculate the enthalpy of the atmosphere. Calculate the energy being input into the atmosphere from the heater and at what time rate. Calculate the difference in energy between the atmosphere and the aluminum wall. Calculate the energy transfer from the atmosphere into the aluminum wall once the atmosphere energy is greater than the wall.

If this is a homework problem, learn how to solve problems logically and it will help you in the future. Engineers get paid to create solutions by understanding a process and then using that understanding to logically visualize a conclusion.

Good Luck!

thank you for your valuable solution ...

Here you go.

And how big is the aluminum chamber?