Which is a correct statement of the second law of thermodynamics? entropy of the universe is constantly increasing. nature allows the conversion of potential energy into kinetic energy, but not vice versa. heat is the only form of energy that can be converted into work with 100% efficiency. energy cannot be created or destroyed, but it can change form.

Asmall electric heater, immersed in 80g of water in a calorimeter of 40j/k raises the temperature from 10.5 degree celsius to 25 degree celsius in 12 minutes. using the same apparatus with 50g of oil instead of water, it is found that the temperature of oil rises from 7 degree celsius to 27 degree celsius in 10 minutes. find specific heat capacity of the oil.