Consider a sample of water at 25 degress celcius in a beaker in a room at 50 deg
ID: 530667 • Letter: C
Question
Consider a sample of water at 25 degress celcius in a beaker in a room at 50 degrees celcius. a. What change do you expect to observe in the water sample? Would this be a spontaneous porcess or not?
b. What are the enthalpy and entropy changes for this change in the water sample? (Just indiate the sign of the changes.) Explain your answers.
c. Does the entory of the water increase of decrease during the change? How do you know?
d. Is there a change in free engergy fo the water smaple? If so, indicate the sign of the free-energy change and explain how you arrived at your answer.
Explanation / Answer
since heat is added to water sample, the degree of disorder of water increases leading to an increase in entropy.
Since heat is added to the water sample, its enthalpy change will be -ve.
Gibbs free energy change= deltaH-T*deltaS
since both deltaH is -ve and deltaS is +ve, gibbs free energy is -ve and the process is spontaneous.