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Your 300 mL cup of coffee is too hot to drink when served at 95.0 degree C. What

ID: 1484461 • Letter: Y

Question

Your 300 mL cup of coffee is too hot to drink when served at 95.0 degree C. What is the mass of an ice cube, taken from a -17.0 degree C freezer, that will cool your coffee to a pleasant 57.0 degree ? Express your answer with the appropriate units. The cylinder in the figure(Figure 1) has a moveable piston attached to a spring. The cylinder's cross- section area is 10 cm^2, it contains 0.0059 mol of gas, and the spring constant is 1500 N/m. At 15 degree C How far is the spring compressed if the gas temperature is raised to 170 degree C? Express your answer to two significant figures and include the appropriate units.

Explanation / Answer

mcCcTc = mice(CiceTice + Lf,ice + CwTw)

=> 300 * 4.18 * (95 - 57) = mice[(2.11 * 17) + 334 + (4.18 * 57)]

=> mice = 78.36 g

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