Ch.6 - Thermochemistry WorksheetSee 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: Assume that the kinetic energy of a 1400 kg car moving at 111 km/h is converted entirely into heat.What amount of water in liters could be heated from 20.0 C to 50.0 C by the car’s energy? (One calori

Solution: Assume that the kinetic energy of a 1400 kg car moving at 111 km/h is converted entirely into heat.What amount of water in liters could be heated from 20.0 C to 50.0 C by the car’s energy? (One calori

Problem

Assume that the kinetic energy of a 1400 kg car moving at 111 km/h is converted entirely into heat.

What amount of water in liters could be heated from 20.0 C to 50.0 C by the car’s energy? (One calorie raises the temperature of 1 mL of water by 1 C.)

Solution

The volume of water that could be heated from 20.0°C to 50.0°C can be calculated by:


1. Determine the kinetic energy of the car

2. Determine the heat in calories from the car

3. Determine the volume of water that could be heated from the heat of the car


Step 1: Kinetic energy can be calculated from mass and velocity.


Expressing the velocity in appropriate units:


Calculating kinetic energy:


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