Question

question 1 which property of entropy allows it to be calculated from reference tables? its dependence on temperature only. its status as a state function. its variability with pressure. its direct measurement in calorimetry.

Explanation:

1. Analyze each option:

• Option 1: Entropy depends on more than just temperature (e.g., pressure, composition for mixtures), so this is incorrect.
• Option 2: A state function depends only on the initial and final states, not the path. Reference tables list entropy values for specific states (like standard states), so being a state function allows using these tables as the value depends on the state, not how the state was reached.
• Option 3: Variability with pressure alone doesn't explain using reference tables; also, entropy depends on multiple factors, and the key for reference tables is the state function property.
• Option 4: Entropy isn't directly measured in calorimetry (calorimetry measures heat, from which entropy change can be calculated for reversible processes, but not direct measurement of entropy itself for reference tables).

Answer:

B. Its status as a state function.