At What Temperatures Will a Reaction Be Spontaneous If Δ_rH°

question 3

Multiple Choice

At what temperatures will a reaction be spontaneous if Δ_rH° = +117 kJ and Δ_rS° = -35 J/K?

• A) All temperatures below 94.1 K
• B) Temperatures between 12.7 K and 135 K
• C) All temperatures above 94.1 K
• D) The reaction will be spontaneous at any temperature.
• E) The reaction will never be spontaneous.

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Definitions:

Factory Overhead

Indirect costs associated with manufacturing, including costs related to operating the manufacturing facilities, aside from direct labor and direct materials costs.

Machine Hours

A measure of the amount of time a machine is operated, used in allocating manufacturing costs.

Journal Entry

A record in accounting that shows a business transaction and its effect on the financial statements, consisting of debit and credit entries.

Predetermined Overhead Rate

A method employed to distribute manufacturing overhead costs to specific production units, utilizing projected expenses and levels of activity.