Substance X Has a Heat of Vaporization of 55

question 66

Multiple Choice

Substance X has a heat of vaporization of 55.4 kJ/mol at its normal boiling point (423°C) . For the process X(l) → X(g) at 1 atm and 423°C, calculate the value of:
-ΔG

• A) 79.6 J/K•mol
• B) -79.6 J/K•mol
• C) 0
• D) 103 J/K•mol
• E) -103 J/K•mol

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Definitions:

Null Hypothesis

A statistical hypothesis that assumes no significant difference or effect in a given set of observations, used as a starting point for statistical testing against the alternative hypothesis.

Alternative Hypothesis

A statement that suggests a possible difference or effect, typically to be tested against a null hypothesis in statistical analysis.

Null Hypothesis

In statistics, a hypothesis that posits no effect or no difference, and the assumption that any deviations from this are due to chance.

Hypothesis Testing

A method of statistical inference used to decide whether a hypothesis about a parameter in a population is likely to be true, based on sample data.