Answer:
a. The kinetic energy of the system is zero.
Explanation:
It starts with a system with two substances or reactants (ex: A and B), which interact and produce different substances or products (ex: C and D) through a chemical reaction, that can release or consume energy. When that system reaches chemical equilibrium the amount of reactants and products is the same, therefore a balance is reached, and there is no more changes in the system. Which means the kinetic energy of the system is zero.
The statement that is true for a system at chemical equilibrium is C. The system can do no work.
Chemical equilibrium simply means the state of a reversible reaction which leads to equality between the rate of forward reaction and the reverse reaction.
For a system at chemical equilibrium, if the connection between the systems lead to a transfer of energy but there's no transfer of matter, then the two systems can reach a thermal equilibrium but won't reach thermodynamic equilibrium. Therefore, the system can do no work.
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