Finding temperature change from heater power in an isochoric process

[tigertan]

Homework Statement

I'm getting a bit stuck with this problem..

Given a volume, it's specific heat at constant volume, an initial temperature, pressure (atmospheric) and the power of a heater within this volume, I am expected to calculate the change in temperature for the body.

Homework Equations

I understand that C_v=du/dT. I also understand that the volume doesn't change as it is an isochoric process.


We get dT= dq/C_v=du/C_v. I don't understnad how to get the heat value. I've converted the power of the heater from Watts to Joules per hour..

 

[Borek]

From the data given you can calculate temperature change per time unit only (so you can say "temperature increased by ... °C per second", but not "temperature increased by ... °C").

 

[tigertan]

how can i calculate the change of heat though, wiht what has been given to me?

 

[tigertan]

am I expected to look up the internal energy on a superheated table and interpolate across to find the first internal energy?

 

[Borek]

how can i calculate the change of heat though, wiht what has been given to me?

You can't without assuming some period of time.