The word 'standard' in standard molar enthalpy change implies

Options

A. Temperature `298K`
B. Pressure `1atm`
C. Temperature `298K` and pressure `1atm`
D. All temperatures and all pressure

Explanation

To answer the question "The word 'standard' in standard molar enthalpy change implies," we will break down the concept step by step.

### Step-by-Step Solution:

1. **Understanding 'Standard' Conditions**:
- The term 'standard' refers to specific conditions under which measurements are taken. In thermodynamics, these conditions are crucial for consistency and comparability of data.

2. **Defining Standard Experimental Conditions**:
...