Spontaneous Reaction Video Lessons

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Problem: You observe that carbon dioxide sublimes. Which of the following statements about the signs of this process is/are true? I) Work (w) is positive. II) Heat (q) is negative. III) Change in Gibbs free energy (∆G) is positive. IV) Change in entropy (∆S) is positive. 1. I and II 2. II and III 3. I, II and III 4. I only 5. IV only  6. III and IV

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Problem Details

You observe that carbon dioxide sublimes. Which of the following statements about the signs of this process is/are true?

I) Work (w) is positive.

II) Heat (q) is negative.

III) Change in Gibbs free energy (∆G) is positive.

IV) Change in entropy (∆S) is positive.

1. I and II

2. II and III

3. I, II and III

4. I only

5. IV only 

6. III and IV

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Based on our data, we think this problem is relevant for Professor Fakhreddine's class at TEXAS.