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HELP! Thermodynamics homework!

Thermodynamics homework help! A mass of 0.35kg of ice at -15°C is lowered into an insulated beaker containing 0.61kg of water at 59°C. What is the temperature after equilibrium has been reached?

Every answer I have given has been wrong and I don't know what to do.
Original post by mcczoe
Thermodynamics homework help! A mass of 0.35kg of ice at -15°C is lowered into an insulated beaker containing 0.61kg of water at 59°C. What is the temperature after equilibrium has been reached?

Every answer I have given has been wrong and I don't know what to do.


When they reach thermal equilibrium, they will both be have the same temperature.

What have you tried?
Reply 2
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mcczoe
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Original post by kingaaran
When they reach thermal equilibrium, they will both be have the same temperature.

What have you tried?

I've tried the Qlost = Qgained approach with the shc of ice and water.
Original post by mcczoe
I've tried the Qlost = Qgained approach with the shc of ice and water.


Okay, can I see your exact equation please?
Reply 4
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mcczoe
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2030=shc of ice, 4180=shc of water
(0.35)(15-x)(2030)=(0.61)(x-59)(4180)
Original post by mcczoe
2030=shc of ice, 4180=shc of water
(0.35)(15-x)(2030)=(0.61)(x-59)(4180)


I think you should be using −15∘C-15^{\circ}C rather than +15∘C+15^{\circ}C.
Reply 6
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mcczoe
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Original post by pleasedtobeatyou
I think you should be using −15∘C-15^{\circ}C rather than +15∘C+15^{\circ}C.

No, it still says it's wrong, with or without the minus sign.
0.645 kg of Water is present at state 1 is state zero is ice justedipped into the watee
(edited 7 years ago)
Reply 8
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mcczoe
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Original post by Anfanny
0.645 kg of Water is present at state 1 is state zero is ice justedipped into the watee

The question says nothing about Hydrogen Bonds, so I think we just ignore them.
Original post by mcczoe
No, it still says it's wrong, with or without the minus sign.


Could you post the full question (and solution if you have it)?
Reply 10
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mcczoe
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A mass of 0.35kg of ice at -15°C is lowered into an insulated beaker containing 0.61kg of water at 59°C. What is the temperature after equilibrium has been reached?
Original post by mcczoe
A mass of 0.35kg of ice at -15°C is lowered into an insulated beaker containing 0.61kg of water at 59°C. What is the temperature after equilibrium has been reached?



I get about 2.9 degrees celcius for the final temp. What was your answer?

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