Solve Thermodynamics Problem: Change in Temp w/ Volume, Power & Specific Heat

  • Thread starter Thread starter tigertan
  • Start date Start date
  • Tags Tags
    Thermodynamics
AI Thread Summary
To calculate the change in temperature for a body in an isochoric process, the specific heat at constant volume (Cv) is essential, as it relates heat transfer to temperature change. The power of the heater can be converted from Watts to Joules per hour, but the heat value (dq) cannot be determined without a specified time period. The relationship dT = dq/Cv indicates that temperature change can only be expressed per time unit, not as a total change without time. Additionally, looking up internal energy values from superheated tables may be necessary for precise calculations. Ultimately, a time assumption is required to compute the total change in heat.
tigertan
Messages
24
Reaction score
0

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


We get dT= dq/Cv=du/Cv. I don't understnad how to get the heat value. I've converted the power of the heater from Watts to Joules per hour..
 
Physics news on Phys.org
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").
 
how can i calculate the change of heat though, wiht what has been given to me?
 
am I expected to look up the internal energy on a superheated table and interpolate across to find the first internal energy?
 
tigertan said:
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.
 

Thread 'Prove that evolution is constant (Provide at least two arguments to support your position)'

I don't get how to argue it. i can prove: evolution is the ability to adapt, whether it's progression or regression from some point of view, so if evolution is not constant then animal generations couldn`t stay alive for a big amount of time because when climate is changing this generations die. but they dont. so evolution is constant. but its not an argument, right? how to fing arguments when i only prove it.. analytically, i guess it called that (this is indirectly related to biology, im...
View full post »

Similar threads

Chemistry Show that book levitation by absorption of heat violates 2nd law
Replies
13
Views
2K
Chemistry Understanding thermodynamics of a stretched rubber band
Replies
2
Views
2K
I Question regarding dh, du, cp, cv for ideal gases
Replies
3
Views
2K
Question about the first law of thermodynamics
Replies
3
Views
2K
Solve Reversible Expansion of Ideal Gas: q, Work, ΔU
Replies
1
Views
2K
Calc Cv from T & V: How to Calculate Cv Homework
Replies
6
Views
12K
I Understand the Thermodynamic Identity: Is This Correct?
Replies
3
Views
2K
Chemistry Understanding the calculation of enthalpy of the formation of benzene
Replies
3
Views
2K
Can I get specific heat without a final temp? (heat of Rxn)
Replies
1
Views
2K
Adiabatic Expansion of Pressurized Air in a Piston-Cylinder Setup
Replies
8
Views
2K

Hot Threads

Recent Insights

Back
Top