The solution becomes hotter when sodium bromide (NaBr) is dissolved in water. What causes the solution to form? What is the driving force of the process?

• A. The solution forms because the dissolved state has a higher energy than the undissolved state. The increase in entropy is the driving force of the process.
• B. The solution forms because the dissolved state has a higher energy than the undissolved state. The decrease in entropy is the driving force of the process.
• C. The solution forms because the dissolved state has a lower energy than the undissolved state. The increase in entropy is the driving force of the process.
• D. The solution forms because the dissolved state has a lower energy than the undissolved state. The decrease in entropy is the driving force of the process.

Answer: (C)