A mixture of ice and water contains 60g of ice and 60g of water. If 60J of heat energy is removed from this mixture then some of the
Correct answer: C. ice will melt
- A. water will vaporize
- B. ice will sublime
- C. ice will melt
- D. water will freeze
Explanation
This is correct because the amount of heat energy removed can melt approximately 0.18 g of ice.To determine what happens when 60J of heat energy is removed from the mixture of ice and water, we need to consider the phase changes and the heat involved.Let's break it down:Ice to Water (Melting):The heat of fusion (Hf) for water is 334 J/g.If 60J of heat energy is removed, it would be insufficient to melt all the ice because it would only be enough to melt approximately 60J / 334 J/g ≈ 0.18 g of ice.Therefore, not all the ice will melt.Water to Ice (Freezing):The heat of fusion (Hf) for water is 334 J/g.Since 60g of water is present, it would require 60g * 334 J/g = 20040 J of heat energy to freeze all the water into ice.Since only 60J of heat energy is removed, it would not be enough to freeze any water into ice.Ice to Water Vapor (Sublimation):The heat of sublimation for ice (Hsub) is 2260 J/g.If 60J of heat energy is removed, it would be insufficient to sublime any ice into water vapor because it would only be enough to sublime approximately 60J / 2260 J/g ≈ 0.0265 g of ice.Therefore, not all the ice will sublime.Water to Water Vapor (Vaporization):The heat of vaporization (Hv) for water is 2260 J/g.Since 60g of water is present, it would require 60g * 2260 J/g = 135600 J of heat energy to vaporize all the water.Since only 60J of heat energy is removed, it would not be enough to vaporize any water into water vapor.Given the options:a. water will vaporize - This is incorrect because the amount of heat energy removed is not sufficient to vaporize any water. b. ice will sublime - This is incorrect because the amount of heat energy removed is not sufficient to sublime any icec. ice will melt - This is correct because the amount of heat energy removed can melt approximately 0.18 g of ice. d. water will freeze - This is incorrect because the amount of heat energy removed is not sufficient to freeze any water.So, the correct answer is:c. ice will melt
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About Thermochemistry and Energetics of Chemical Reactions
Thermochemistry measures energy changes in chemical reactions and distinguishes exothermic from endothermic processes. Work covers systems, surroundings and state functions, internal energy, the first law of thermodynamics, enthalpy and Hess's law, including the sign conventions used when heat enters or leaves a system.
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