Remarks If This Problem Is Solved Assuming Wrongly That All The Ice Melts A Final Temperature Of T 16 5 C Is Obt 1 (56.25 KiB) Viewed 43 times
Remarks If This Problem Is Solved Assuming Wrongly That All The Ice Melts A Final Temperature Of T 16 5 C Is Obt 2 (44.09 KiB) Viewed 43 times
# REMARKS If this problem is solved assuming (wrongly) that all the ice melts, a final temperature of T = -16.5°C is obtained. The only way that could happen is if the system were not isolated, contrary to the statement of the problem. In the exercise, you must also compute the thermal energy needed to warm the ice to its melting point. QUESTION What effect would doubling the initial amount of liquid water have on the amount of ice melted? (Select all that apply.) Half as much of the ice will melt. All the ice will melt. The final temperature will be lower. The final temperature will be higher. The final temperature will be the same.. Twice as much of the ice will melt. PRACTICE IT Use the worked example above to help you solve this problem. A 5.10 kg block of ice at 0°C is added to an insulated container partially filled with 11.4 kg of water at 15.0°C. (a) Find the final temperature, neglecting the heat capacity of the container. x Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. °C (b) Find the mass of the ice that was melted. Your response differs from the correct answer by more than 100%. kg. EXERCISE HINTS: GETTING STARTED II'M STUCK! If 7.40 kg of ice at -5.00°C is added to 12.0 kg of water at 25°C, compute the final temperature. T= x How much energy is needed to melt the ice? How much energy must be extracted from the water to lower 34.900 141
PRACTICE IT Use the worked example above to help you solve this problem. A 5.10 kg block of ice at 0°C is added to an insulated container partially filled with 11.4 kg of water at 15.0°C. (a) Find the final temperature, neglecting the heat capacity of the container. x Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. "C (b) Find the mass of the ice that was melted. X Your response differs from the correct answer by more than 100%. kg EXERCISE HINTS: GETTING STARTED I I'M STUCK! If 7.40 kg of ice at -5.00°C is added to 12.0 kg of water at 25°C, compute the final temperature. T= x How much energy is needed to melt the ice? How much energy must be extracted from the water to lower it to 0°C? Which is larger?°C How much ice remains, if any? x There are many possible final states. Pick one and solve for the unknown. If the result contradicts your choice, then try a different one. kg Submit Answer
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