Practice Gibbs Free Energy (8.1) - Combustion and Fuels

Practise this section

9 questions

Flashcard drill
2 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
Sign up to start the exercise
Quiz
3 questions · about 2 min · pass mark 70%. Hints available.
Sign up to start the quiz

6 sample questions

Question 1.
What does Gibbs free energy help predict?
Show hintHide hint
Think about the conditions for a reaction to occur.
Question 2.
State the equation for Gibbs free energy.
Show hintHide hint
Remember the variables involved.
3Question 3.
What does Gibbs free energy indicate about a reaction?
- Direction of reaction
- Heat produced
- Pressure required
Show hintHide hint
What determines if a reaction can occur?
4Question 4.
True or False: A negative ΔG0 always means a reaction is non-spontaneous.
- True
- False
Show hintHide hint
Consider the sign of ΔG0.
Question 5.
A reaction has ΔH = -100 kJ and ΔS = 200 J/K. At what temperature will the reaction become spontaneous?
Show hintHide hint
Use the ΔG equation and rearrange it.
Question 6.
Given that Kp for a reaction at standard conditions is 1. Kp is equal to 1 when ΔG0 is?
Show hintHide hint
Think about what equilibrium means for free energy changes.

5 more questions in this section. Enroll free to practise them all.