Answer to Question #65822 in Physical Chemistry for umar

Question

Question 5 : What does it mean if the [Math Processing Error]
ΔH
value for a chemical reaction is positive?
kinetic energy is increasing in the system
Potential energy is decreasing in the system
products have less potential energy than reactants
reactants have less potential energy than products.

Question 6 : If a process is exothermic and not spontaneous, then what must be true?
[Math Processing Error]
ΔS>0

[Math Processing Error]
ΔG=0

[Math Processing Error]
ΔH>0

[Math Processing Error]

Answer 1

Question 5: The correct answer: reactants have less potential energy than products.

Question 6: The spontaneous processes are accompanied by an increase in entropy. Exothermic systems are accompanied by a decrease in enthalpy. Spontaneous systems are accompanied by a decrease in Gibbs energy. So the correct answer: ΔG=0.

Answer:
Question 5: reactants have less potential energy than products;
Question 6: ΔG=0.