Which of the Following Processes Is/are Exothermic?
1)the Reaction of Butane

question 72

Multiple Choice

Which of the following processes is/are exothermic?
1) the reaction of butane with oxygen
2) the melting of gold
3) cooling copper from 225 ^$\circ$ C to 65 ^$\circ$ C

• A) 1 only
• B) 2 only
• C) 3 only
• D) 1 and 3
• E) 1,2,and 3

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Definitions:

Net Operating Income

The total profit of a business after operating expenses are subtracted from gross profit but before deducting interest and taxes.

Contribution Margin

The amount of revenue remaining after deducting variable costs, which can be used to cover fixed costs and contribute to profit.

Fixed Costs

Costs that do not change with the level of production output, such as rent, salaries, and insurance.

Variable Selling

Costs that change in proportion to the volume of goods or services sold.