An Ideal Gas Is Expanded at Constant Temperature

question 17

Multiple Choice

An ideal gas is expanded at constant temperature.What are the signs (+,-,or 0) of ΔH,ΔS,and ΔG for this system?

• A)ΔH = +,ΔS = -,ΔG = +
• B)ΔH = 0,ΔS = +,ΔG = -
• C)ΔH = 0,ΔS = -,ΔG = +
• D)ΔH = -,ΔS = +,ΔG = -

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Definitions:

Machine Hours

The cumulative duration during which machines are utilized in the production process, often a factor in costing models.

Contribution Margin

The amount by which sales revenue exceeds variable costs, it's a key figure that helps in assessing the profitability of products or services.

Selling Price

The amount of money charged for a product or service, which can cover costs and provide profit for the seller.

Machine Hours

represent the total time that production equipment or machines are operated within a specific period, often used to allocate manufacturing overhead.