Q: A styrofoam cup of negligible heat capacity contains 150 g (0.15 kg) of water at 10 degrees Celsius. If you add 100 g (0.1 kg) of water at a temperature of 85 degrees Celsius, what is the final temperature of the mixture after it has been thoroughly mixed?
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My attempt...
mcΔθ = mcΔθ
mΔθ = mΔθ Specific heat capacity of water is the same on both sides so they cancel)
(0.15)(T - 10) = (0.1)(T - 85)
Which worked out to be...
T = -140 degrees Celsius
This is definitely incorrect, but I cannot see any other way..please advise!
Thank you!
--------------------------------------…
My attempt...
mcΔθ = mcΔθ
mΔθ = mΔθ Specific heat capacity of water is the same on both sides so they cancel)
(0.15)(T - 10) = (0.1)(T - 85)
Which worked out to be...
T = -140 degrees Celsius
This is definitely incorrect, but I cannot see any other way..please advise!
Thank you!
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Let t = the final temperature of the water mixture
150(t-10) = 100 (85-t)
Solve for t
t = 40
150(t-10) = 100 (85-t)
Solve for t
t = 40