Question

Q.6 Give your recommendation about the concept of specific heat capacity and latent heat can
be utilized in ice- cream industry to cool the ice creams and in cooking food in the kitchen. In the
latent heat formula, Q = ± mL, how can you make the significance of dual sign in the formula?
How can you provide scientific justifications to prove that there are some differences in total
cooking time in open vessels compared that with a closed vessel like pressure cooker?

Answer 1

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So here is your answer dear

The positive and negative sign indicates that in some point of processes heat will be added to the system and in some of the processes heat will be removed /eliminated from the system. L is the
Latent heat which is the amount of heat which has to be removed or added for any phase change. If ice or ice cream has to be
formed from liquid then heat has to be removed from
constant temperature. And if liquid has to be formed from
solid then we have to add some latent heat again at
some constant temperature.

the difference in total cooking time is due to that reason only
as the boiling point or melting point of any substance
depends upon the atmospheric pressure and you can say temperature hence the latent
heat that has to be removed or provided also depends
upon the atmospheric pressure. At lower atmospheric
pressure, the latent heat will be greater which will take
more time to be removed or provided. For example at
hilly areas which are at greater altitudes have lesser
atmospheric pressure it will take more time for cooking
rather than at plane areas.

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