Calculating heat


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Tony Ong 3K
Posts: 63
Joined: Fri Sep 28, 2018 12:23 am

Calculating heat

Postby Tony Ong 3K » Sun Mar 10, 2019 11:56 pm

What would be the process to solve this question:
Suppose 2 mole ice cube at -10 C is placed in 20.0mole of water at 20 C. Enthalpy of fusion of ice is 6.01kj/mol and molar heat capacities of ice and water at constant pressure are 37.7 J/K/mol and 75.3 J/K/mol. Calculate temperature after thermal equilibrium is reached.

EllerySchlingmann1E
Posts: 76
Joined: Fri Sep 28, 2018 12:24 am

Re: Calculating heat

Postby EllerySchlingmann1E » Mon Mar 11, 2019 9:41 am

This question is asking you to find the final temperature of the mixture. We want to assume that all of the heat is contained within the system, so q(ice) = -q(water). Now you just want to use the heat of phase change (q=n*deltaH) and the nCdeltaT formulas to find the final temperature, which would be the temperature at thermal equilibrium. Hope that helps!


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