posted by jess on .
im working on a lab in chemistry called measuring energy changes :Calorimetry
how to you determine the molar latent heat of fusion of ice using q=mcT ??
why was the ice driedbefore it was placed in water?
why is hot warer ysed rather than room temp?
in which dirextion would your value for molar latent heat of fusion of ice have shifted if these step[s has not been carried out?
help would be greatly appreciated !
If the ice had not been dry, you would have been measuring the two things: heat to melt ice, and heat to heat up the surface melted water, making the calculations more complex
Hot water is used to get a large change in temperature of the water, and to drive the final temperature close to room temperature (so measuring heat transfer is easier).