What Is the Sign Of $\Delta$ Hº(system)and $\Delta$ Sº(system)if a Chemical Reaction Is Nonspontaneous at All Temperatures Under

question 61

Multiple Choice

What is the sign of $\Delta$ Hº(system) and $\Delta$ Sº(system) if a chemical reaction is nonspontaneous at all temperatures under standard conditions?

• A) (\(\Delta\)Hº)(system)is negative,and \(\Delta\)Sº(system)is positive.
• B) (\(\Delta\)Hº)(system)is negative,and \(\Delta\)Sº(system)is negative.
• C) (\(\Delta\)Hº)(system)is positive,and \(\Delta\)Sº(system)is positive.
• D) (\(\Delta\)Hº)(system)is positive,and \(\Delta\)Sº(system)is negative.
• E) none of these

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Definitions:

Subjective Uncertainty

The perception of doubt or inability to predict outcomes due to lacking information or inherent unpredictability in situations.

Objective Uncertainty

The state of having insufficient knowledge due to an inherently unpredictable environment or situation.

Contribution Margin

Contribution margin is the amount by which a product's sales revenue exceeds its variable costs, indicating the contribution of sales towards fixed costs and profits.

Break-even Point

The financial point at which total revenue equals total costs, resulting in zero net profit or loss.