Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074



Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

A hot metal block is plunged into water in a well-insulated container. The temperature of the metal block goes down, and the temperature of the water goes up until their temperatures are the same. A total of 1500 J of energy' is lost by the metal object. By how much did the energy of the water increase? What law of science is illustrated by this problem?

Interpretation Introduction


The amount of energy gained by water and law of science involved has to be given.

Concept introduction:

Energy is the capacity to do work, and can neither be created nor destroyed.  Generally, chemical reaction almost always either release or absorb energy.

Law of energy conservation states that the total energy of an isolated system remains constant, it is conserved over time.

Types of energy:

Kinetic energy is the energy associated with motion.  Thermal energy, mechanical energy, electrical energy, and acoustic energy are categorized in kinetic energy.

Potential energy is the energy results from an object’s position or state.  Gravitational energy, chemical energy, and electrostatic energy are categorized in potential energy.


As known, energy can neither be created nor destroyed.  Accordingly, the amount of energy lost by one substance is the same energy gained by another substance in an isolated system (transformation of energy from one form to another)...

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