Question

Mark the correct statement.

• A. For a chemical reaction to be feasible, $Ca(s) + \frac{1}{2}O_{2}(g) \rightarrow CaO(s)$ should be zero.
• B. Entropy is a measure of order in a system
• C. For a chemical reaction to be feasible, $CaCO_{3}(s) \rightarrow CaO(s) + CO_{2}(g)$ should be positive
• D. The total energy of an isolated system is constant

Answer 1

Answer: (D)

The total energy of an isolated system is constant

Answer 2

Total energy of an isolated system is constant.