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Final temperature of the liquid water?

  • Thread starter name_ask17
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  • #1
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Homework Statement


A 10-kg block of ice has a temperature of -12°C. The pressure is one atmosphere. The block absorbs 4.15 106J of heat. What is the final temperature of the liquid water?



Homework Equations


Q=mcT



The Attempt at a Solution


i know i have to find the change from -12 to 0 deg c and then use mLfusion for the ice and add them. i am lost after that. i keep getting the wrong answer. how do i do this?
 

Answers and Replies

  • #2
rock.freak667
Homework Helper
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The Attempt at a Solution


i know i have to find the change from -12 to 0 deg c and then use mLfusion for the ice and add them. i am lost after that. i keep getting the wrong answer. how do i do this?
You'll need to do an energy balance.

Heat absorbed = heat to change phase of the ice + heat to increase the temperature from -12 to T.

you know that heat to change phase of the ice=mLfusion and the heat to increase the temperature = mc(T2-T1).
 
  • #3
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so would i do Q=mcT+mL as 4.15E6=(10)(4186)(T-12)+(10)(334)? because that is not giving me the correct answer. can you please explain to me what I am doing wrong here?
 
  • #4
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dont bother. i undersand it now. i was to take the heat gained to ive, ice melting, and water warming up. thank you for your assistance
 

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