Specific Heat Capacity Question

  • Thread starter chops369
  • Start date
  • #1
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Homework Statement


How much milk at 11 degrees Celcius was added to 0.16 kg of coffee at 91 degrees Celcius if the final temperature is 76.8 degrees Celcius?


Homework Equations


Well my teacher explained how to rearrange cm∆T = cm∆T to somehow come up with an equation to solve for the final temperature: Tf = T1 * m1 + T2 * m2 / (m1 + m2) How would I rearrange that to solve for one of the masses?


The Attempt at a Solution


No idea :(
 

Answers and Replies

  • #2
LowlyPion
Homework Helper
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Homework Statement


How much milk at 11 degrees Celcius was added to 0.16 kg of coffee at 91 degrees Celcius if the final temperature is 76.8 degrees Celcius?

Homework Equations


Well my teacher explained how to rearrange cm∆T = cm∆T to somehow come up with an equation to solve for the final temperature: Tf = T1 * m1 + T2 * m2 / (m1 + m2) How would I rearrange that to solve for one of the masses?

The Attempt at a Solution


No idea :(
I think you are missing a parentheses.

Tf = (T1 * m1 + T2 * m2) / (m1 + m2)

You want to consider the rather aptly named weighted average to determine your answer. Remember though that temperatures need to be in Kelvin.

As to solving for a mass, it's your only unknown. Think Nike: Just do it.
 
  • #3
56
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I'm not too sure I catch your drift.
 
  • #4
LowlyPion
Homework Helper
3,090
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I'm not too sure I catch your drift.
Just plug in the numbers and solve.
 

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