2019 · Q79
Which of the following is/are state function/ functions?
1. q + w
2. q
3. w
4. H – TS Select the correct answer using the code given below :
General KnowledgeChemistry
- A1 and 4 only
- B1, 2 and 4
- C2, 3 and 4
- D1 only q
Explanation
A state function depends only on the state of the system, not the path taken. By the First Law, q + w = delta-U, the change in internal energy, which is a state function; similarly H - TS = G, the Gibbs free energy, is a state function. Heat (q) and work (w) individually are path functions. Statements 1 and 4 are therefore state functions. Hence option A is correct.