To Which One of the Following Reactions Occurring at 25°C $\Delta$

question 28

Multiple Choice

To which one of the following reactions occurring at 25°C does the symbol $\Delta$ H°_f[HNO₃(l) ] refer?

• A)H(g)+ N(g)+ O₃(g)\(\rarr\) HNO₃(l)
• B)(1/2)H₂(g)+ (1/2)N₂(g)+ (3/2)O₂(g)\(\rarr\) HNO₃(l)
• C)HNO₃(l)\(\rarr\) (1/2)H₂(g)+ (1/2)N₂(g)+ (3/2)O₂(g)
• D)HNO₃(l)\(\rarr\) H(g)+ N(g)+ 3O(g)
• E)H₂(g)+ N₂(g)+ O₃(g)\(\rarr\) HNO₃(l)

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Definitions:

Rejection Region

The range of values for which the null hypothesis is considered unlikely and is rejected in a hypothesis test.

Significance Levels

Significance levels indicate the probability of observing the test statistic as extreme as the results obtained, given that the null hypothesis is true, acting as a criterion for the decision of whether to reject it.

Sample Sizes

The number of observations or data points collected in a subset of a population for the purpose of statistical analysis.

Test Statistic

A calculated value used in statistical testing to determine whether to reject the null hypothesis, based on the difference between observed data and what is expected under the null hypothesis.