What Is the Change in Entropy When 0

question 51

Multiple Choice

What is the change in entropy when 0.802 g of silicon is burned in excess oxygen to yield silicon dioxide at 298 K?
Si(s) + O₂(g) → SiO₂(s) ; ΔS° = -182.4 J/K at 298 K

• A)182J/K
• B)146 J/K
• C)-1.75 × 10^-2 J/K
• D)-6.39 × 10³ J/K
• E)5.2 J/K

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Definitions:

Critical Value

A threshold value that defines the boundary of the critical region, where if the test statistic exceeds this value, the null hypothesis is rejected.

Alpha

A threshold value used in hypothesis testing that represents the level of significance, typically set at 0.05 or 0.01, indicating the probability of wrongly rejecting the null hypothesis.

Chi-square Statistic

A statistical measure used to determine if there is a significant relationship between two categorical variables.

Degrees of Freedom

The number of independent values or quantities that can vary in the calculation of a statistic.