Which of the following are state functions?
(i)q (ii)heat capacity (iii) specific heat capacity (iv) `Delta_(r)H^(@)` (v) w.

Explanation

To determine which of the given options are state functions, we need to understand the definitions of state functions and path functions in thermodynamics.

### Step-by-Step Solution:

1. **Understanding State Functions and Path Functions**:
- **State Functions**: These are properties that depend only on the state of the system (initial and final states) and not on how the system arrived at that state. Examples include internal energy, enthalpy, entropy, and Gibbs free energy.
- **Path Functions**: These depend on the specific path taken to reach a particular state. Heat (q) and work (w) are examples of path functions.

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