An ice bag containing 275 g ice CHEMISTRY HELP?
An ice bag containing 275 g ice at 0 degree C was used to treat sore muscles. When the bag was removed, the ice had melted and the liquid water had a temperature of 24.0 degree C. How many kilojoules of heat were absorbed?
****I have the answer in the back of the book but I am not getting the same, if you could please do a step by step**** Answer is 119.5 kJ
The latent heat (the heat needed to take it from a solid to a liquid) is 333.55 kJ/kg of water.
The specific heat (the heat needed to increase water 1 degree C) is 4.18 kJ/kg.
Total energy = Mass*(Latent Heat + Specific Heat*Degrees Increased)
Total Energy = .275(333.55 + 4.18*24)
Total Energy = 119.8 kJ which is close enough to your answer
How to Make a Homemade Ice Pack
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