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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: s22345 on April 18, 2017, 07:51:34 AM

Title: Latent heat
Post by: s22345 on April 18, 2017, 07:51:34 AM

A vessel weighing 80 g (S.H.C.= 0.8 J/g) contains 250 g of water at 35 C. Calculate the amount of ice at 0 C, which must be added to be added to it, so that the final temperature is 5 C. (Latent heat of ice= 340 J/g).

Title: Re: Latent heat
Post by: Borek on April 18, 2017, 09:51:12 AM

You have to show your attempts at solving the problem to receive help, this is a  forum policy.

Please read the forum rules (http://www.chemicalforums.com/index.php?topic=65859.0).

Title: Re: Latent heat
Post by: s22345 on April 20, 2017, 06:30:36 AM

can we use the first law of thermodynamics here?

Title: Re: Latent heat
Post by: Borek on April 20, 2017, 10:58:03 AM

Every heat balance problem is the application of the first law of thermodynamics. But no need for big guns here, it is just about writing a correct heat balance equation.

Title: Re: Latent heat
Post by: Enthalpy on April 21, 2017, 07:03:10 PM

Don't forget that the added ice brings additional heat capacity.