Termochem problem. Work required to heat water

  • Thread starter Dars
  • Start date
  • #1
Dars
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0

Homework Statement



"You want to heat 1 L of water by 10 ºC so you heat it with a mechanical egg beater that is powered by a 1kg mass on a rope over a pulley. How far does the mass have to descend to supply enough work for heating the water?



Homework Equations


delta T = 10degC
delta C = delta Q / delta T
Work in gravity is: integ x_f / x_i (mg)dx


The Attempt at a Solution


I dont understand how to get the work. If i knew delta U then I could use U = q+w. So i am stuck as to where to start. Please help me get started..thanks

Homework Statement





Homework Equations





The Attempt at a Solution

 

Answers and Replies

  • #2
Borek
Mentor
29,101
3,712
It is just an energy conservation problem, q=w, nothing more fancy.
 

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