Ch.11 - Liquids, Solids & Intermolecular ForcesWorksheetSee all chapters
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Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds

Solution: Assume 12,500 J of energy is added to 2.0 moles of solid H2O (ice) at 0.0°C. The molar heat of fusion is 6.02 kJ/mole. The specific heat of water is 4.184 J/mol K. The molar heat of vaporization is 40.6 kJ/mole. The resulting sample contains which of the following?(a) Only ice(b) Ice and water(c) Only water(d) Water and water vapor(e) Only water vapor

Problem

Assume 12,500 J of energy is added to 2.0 moles of solid H2O (ice) at 0.0°C. The molar heat of fusion is 6.02 kJ/mole. The specific heat of water is 4.184 J/mol K. The molar heat of vaporization is 40.6 kJ/mole. The resulting sample contains which of the following?

(a) Only ice

(b) Ice and water

(c) Only water

(d) Water and water vapor

(e) Only water vapor

Solution

Account the energy needed to convert the 2 moles of solid H2O to liquid and eventually gas if enough energy is supplied given that 12,500 J of energy is added.

Recall that heat of fusion is the required heat to totally convert solid H2to liquid H2

In this case, we have the molar heat of fusion of water as 6.02 kJ/mole.

Calculating the energy needed to convert 2 moles of ice to liquid:

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