Question

Thermodynamics is not concerned about_____
A.The energy changes involved in a chemical reaction.
B.The extent to which a chemical reaction proceeds.
C.The rate at which the reaction proceeds.
D.The feasibility of a chemical reaction.

Answer 1

Hint: Thermodynamics is the study of relationships between heat and other forms of energy. It is a branch of science that describes how thermal energy is converted into another form of energy or vice-versa and also how this change affects the matter.

Complete Step-by-Step Solution:
Thermodynamics is mainly based on the initial and final state of a system that is undergoing any change. It is important because-
a)It tells us whether the reaction will occur or not when two reactants are mixed under the given set of conditions. This is called the feasibility of a chemical reaction.
b)It also tells us the extent of the reaction before equilibrium is achieved or up to which a chemical reaction proceeds.
c)It tells about the energy changes involved in a chemical reaction.
But it does not tell us about the rate at which the reaction proceeds because the rate of reaction is dealt with in the kinetics of the reaction.

Answer- Hence the correct answer is C.

Note: Thermodynamic process is of four types-
1.Isothermal process- When during a reaction the temperature remains constant, then it is called the isothermal process.
2.Isochoric process- When during a reaction the volume of the system remains constant, then it is called the isochoric process.
3.Isobaric process- When during a reaction the pressure of the system remains constant, then it is called the isochoric process.
4.Adiabatic process- When during a reaction the heat flow of the system remains constant, then it is called the adiabatic process. This means the system is completely insulated so there is no heat flow between the system and the surrounding.