Which of the following processes require energy as they occur (additional energy to be added)?...

Question:

Which of the following processes require energy as they occur (additional energy to be added)? (Select all that apply.)

A. Iron metal corrodes.

B. A ball is thrown into the air.

C. A clear container becomes a uniform color after a small amount of colored gas is added.

D. KI dissolves in H{eq}_2 {/eq}O.

E. A car is built.

F. A raindrop falls to earth.

G. Green plants produce glucose by photosynthesis.

Enthalpy of process

An exothermic reaction is one in which overall energy is released during the reaction, while an endothermic reaction is one in which overall energy is required for reaction to happen.

Answer and Explanation: 1

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A

Corrosion of iron metal means reaction of iron with water and oxygen forming rust (iron oxide). Iron oxide is forming as it is more stable than...

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Enthalpy: Energy Transfer in Physical and Chemical Processes

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Chapter 13 / Lesson 2
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When energy is transferred during a chemical reaction, it is called enthalpy. Examine the changes that happen, the relationship to energy, heat, and temperature, exothermic and endothermic processes, and physical and chemical changes during enthalpy.


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