What is the specific heat of the metal in this specific heat problem?

Click For Summary

Homework Help Overview

The discussion revolves around a specific heat problem involving a metal sample and water. The original poster presents a scenario where a heated metal is placed in water, prompting questions about temperature changes and thermal equilibrium.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants question the initial temperature of the metal and the water, particularly why the water's final temperature is considered the initial temperature for the metal. There is also discussion about the calculation of temperature changes and the concept of thermal equilibrium.

Discussion Status

The discussion is ongoing, with participants exploring different interpretations of the problem setup. Some guidance has been offered regarding the concept of thermal equilibrium, but no consensus has been reached on the initial conditions or the approach to the solution.

Contextual Notes

There are uncertainties regarding the definitions of initial and final temperatures in the context of the problem, as well as the assumptions made about thermal equilibrium between the metal and water.

lc99
Messages
161
Reaction score
3

Homework Statement



A 12.0 g sample of a metal is heated to 90.0 °C. It is then dropped into 25.0 g of water. The temperature of the water rises from 22.5 to 25.0 °C. The specific heat of water is 4.18 Jg-1°C-1.
Calculate the specific heat of the metal. Express your answer in Jg-1°C-1

Homework Equations

The Attempt at a Solution



Why is the change in temperature for the metal 90 - 25? Why is 25 degrees celsius the initial temp?[/B]
 
Physics news on Phys.org
Is that an attempt at solution ?
Who says the initial temp is 25 C ?
 
BvU said:
Is that an attempt at solution ?
Who says the initial temp is 25 C ?
The solution goes like this.qrxn=-qwater
mcdeltat= -mcdeltat
12C(90-25)=-25(25-22.5)(4.184) and solve for C
 
lc99 said:
Why is the change in temperature for the metal 90 - 25? Why is 25 degrees celsius the initial temp?
If the temperature of the water raises up to 25.0 °C and not more, it means that it is the point where there is thermal equilibrium. The metal must be at the same temperature.
 

Similar threads

Replies
54
Views
9K
  • · Replies 3 ·
Replies
3
Views
5K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 3 ·
Replies
3
Views
4K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 5 ·
Replies
5
Views
3K
  • · Replies 3 ·
Replies
3
Views
1K
  • · Replies 3 ·
Replies
3
Views
4K
  • · Replies 21 ·
Replies
21
Views
2K