At 1 atm,liquid water is heated above 100°C.
- $\Delta$ S_surr for this process is

Question

At 1 atm,liquid water is heated above 100°C. -$\Delta$S_surr for this process is

Quizplus · Accepted Answer

At 1 atm pressure, liquid water starts boiling at 100°C and gets converted into steam. The process of evaporation requires energy to break the intermolecular forces between water molecules, hence it is an endothermic process. This means that energy is absorbed from the surroundings, making the change in internal energy (ΔU) positive. As the system gains energy, the surroundings lose energy, making the change in entropy (ΔS) negative. According to the second law of thermodynamics, the total entropy change for a system and its surroundings must be positive. As ΔSsurr = -ΔQ/T, where ΔQ is the amount of heat lost by the surroundings and T is the temperature of the surroundings, the negative ΔSsurr indicates that heat has been absorbed from the surroundings. Hence, the free energy change for the system and its surroundings is negative, indicating that the process is spontaneous. Therefore, the answer is B, i.e., ΔG < 0.

At 1 Atm,liquid Water Is Heated Above 100°C Δ\DeltaΔ Ssurr for This Process Is A)greater Than Zero B)less Than

At 1 Atm,liquid Water Is Heated Above 100°C $\Delta$ S_surr for This Process Is
A)greater Than Zero
B)less Than