Ch.11 - Liquids, Solids & Intermolecular ForcesWorksheetSee all chapters
All Chapters
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: What quantity of energy does it take to convert 0.500 kg ice at -20. ˚C to steam at 250. ˚C? Specific heat capacities: ice, 2.03 J/g • ˚C; liquid, 4.2 J/g • ˚C; steam, 2.0 J/g • ˚C; ΔHvap = 40.7 kJ/mo

Solution: What quantity of energy does it take to convert 0.500 kg ice at -20. ˚C to steam at 250. ˚C? Specific heat capacities: ice, 2.03 J/g • ˚C; liquid, 4.2 J/g • ˚C; steam, 2.0 J/g • ˚C; ΔHvap = 40.7 kJ/mo

Problem

What quantity of energy does it take to convert 0.500 kg ice at -20. ˚C to steam at 250. ˚C? Specific heat capacities: ice, 2.03 J/g • ˚C; liquid, 4.2 J/g • ˚C; steam, 2.0 J/g • ˚C; ΔHvap = 40.7 kJ/mol; ΔHfus = 6.02 kJ/mol.

Solution

The conversion of ice at -20°C to stem at 250°C happens in 5 steps as shown below:

Calculate the heat required for each step:

Use the following equation for the increasing temperature step:         

Calculate first the amount of heat required to increase the temperature of ice from -20°C to 0°C:

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