Question

The laws of thermodynamics speak about
A.Rates of chemical changes
B.Feasibility and energy transformations of a process
C.Both the rate and energy changes of a process
D.Energy changes in chemical reactions only

Answer 1

Hint:Thermodynamics is a branch of science that connects heat and other forms of energy and the interconversion of heat to the other forms and vice-versa.

Complete step by step solution:
Thermodynamics has four laws. The zeroth law of thermodynamics says that if two bodies are in thermal equilibrium with each other and if a third body is also at thermal equilibrium with either of the two bodies then all the three bodies will be in thermal equilibrium with each other.
The first law of thermodynamics states that the heat energy supplied to a system is spent to increase the internal energy of the system as well as to perform external work.
The second law of thermodynamics states that the heat energy cannot be transferred from a body at lower temperature to a body at higher temperature.
The third and the final law of thermodynamics states that the entropy of a pure crystal at absolute zero temperature is zero. Entropy is also called the measure of randomness or the disorder of the system.
From these statements it can be concluded that Thermodynamics deals with the feasibility and the energy transformations of a process.

So, the correct answer is option B.

Note:
There are many areas in which thermodynamics finds its applications. The vacuum pump, the air conditioner, the refrigerator, all work on the principles of thermodynamics. The subject is so huge that it has got four different branches and each branch is different from the other, they are: classical thermodynamics, statistical mechanics, chemical thermodynamics, and equilibrium thermodynamics.