Question

A 0.25g ice cube is put into a thermos with 20.0g of 10.0°C water.
Will the ice cube increase or decrease in temp?
Will the water increase or decrease in temp?
will the two changes be equal? why?
what will the final temperature be?

I have this as a lab hmwk. I'm not sure
how to go about answering this because it feels like I'm missing information.
Should I be using The specific heat of water? How would I find the T final? do I calculate the water and cube separately?

please help
Thank you,
Dani

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Answer 1

1) the ice cube increase in temperature.

2) the water decrease in temperature.

3) No, the two changes will not be equal because mass of both ice cube and water is not equal.

4) heat absorded by ice cube = heat released by water

0.25 g x 4.184 J/g-C x ( T - 0.0 ) = 20.0 x 4.184 J/g-C x ( 10 - T )

T = 800 - 80 T

81 T = 800

T = 9.87 C