Thermodynamics Terms

Step 1: Concept
Entropy is a measure of the randomness or disorder of a system.
Step 2: Analysis
In liquids, molecules have more randomness compared to solids.
Step 3: Conclusion
When ice (solid) melts into water (liquid), the randomness increases, therefore entropy increases.
Final Answer: (D)

Step 1: Understanding the Concept:
Gibbs-Helmholtz equation relates Gibbs free energy, enthalpy, and temperature.

Step 2: Detailed Explanation:
The Gibbs-Helmholtz equation is: .
Rearranging: .

Step 3: Final Answer:

Step 1: Understanding the Concept:
.
Step 2: Detailed Explanation:
moles gaseous products - moles gaseous reactants = 2 - 2 = 0
So
Step 3: Final Answer:
kJ.