An ice tray contains 360 g of liquid water at 0°C. Calculate the change in entropy of the water as it freezes slowly and completely at 0°C.
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A: Given: Q=58.3j T1=331 deg.c=604K T2=197 deg.c=470K Lets's find Change in entropy.
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- A 1 500-kg car is moving at 20.0 m/s. The driver brakes to a stop. The brakes cool off to the temperature of the surrounding air, which is nearly constant at 20.0°C. What is the total entropy change?What is the change in entropy in converting 1.0 kg of ice at 0.0 degree celsius to 1.0 kg water at 0.0 degree celsius?A 2.00-L container has a center partition that divides it into two equal parts as shown below. The left side contains n = 0.061 0 mol of H, gas, and the right side contains n = 0.061 0 mol of 0, gas. Both gases are at room temperature and at atmospheric pressure. The partition is removed, and the gases are allowed to mix. What is the entropy increase of the system? וןנ
- Suppose that when you exercise, you consume 100g of glucose and that all the energy released through the mechanism of heat remains in your body at 37 degrees Celsius. What is the change in entropy of your body? (ans: 5.03 kJ/K)A room is at a constant 295 K maintained by an air conditioner that pumps heat out. How much does the refrigerator change the entropy AS of the room for each 5.80 kJ of heat that it removes? AS = J/KA 100-lbm block of a solid material whose specific heat is 0.5 Btu/lbm·R is at 80°F. It is heated with 10 lbm of saturated water vapor that has a constant pressure of 20 psia. Determine the final temperature of the block and water, and the entropy change of the entire system. Is this process possible? Why?