Cryogenics has the potential to be useful in a variety of fields, including medicine. suppose you have engineered a method to successfully deep-freeze and thaw human organs using liquid nitrogen without any freezing damage to the cells and tissue structure. how much heat must be removed from a liver (1.5 kg) to drop its temperature from 310 k to 180 k and freeze the tissue? for liquids and solids, heat capacity at constant pressure, cp, is approximately equal to heat capacity at constant volume, cv.

Explanation:

It is known that the specific heat capacity of Liver is 3.59 kJ

It is given that :

Initial temperature of Liver = Body temperature = = 310 K

Final temperature of Liver = 180 K

Relation between heat energy, mass, and change in temperature is as follows.

                        Q =

Now, putting the given values into the above formula as follows.

                    Q =

                    Q =

                         =  700.05 kJ

Therefore, we can conclude that amount of heat which must be removed from the liver is 700.05 kJ.

law of conservation of matter

the dissolution of polymer can be thermodynamically described in 2 steps.