The Element Oxygen Was Prepared by Joseph Priestley in 1774 $\rarr$

question 8

Multiple Choice

The element oxygen was prepared by Joseph Priestley in 1774 by heating mercury(II) oxide: HgO(s) $\rarr$ Hg(l) + ¹/₂O₂(g) , $\Delta$ H° = 90.84 kJ/mol.
Estimate the temperature at which this reaction will become spontaneous under standard state conditions.
S°(Hg) = 76.02 J/K·mol
S°(O₂) = 205.0 J/K·mol
S°(HgO) = 70.29 J/K·mol

• A)108 K
• B)430 K
• C)620 K
• D)775 K
• E)840 K

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Definitions:

Error Variable

A random variable signifying the discrepancy between the forecasted value and the true observed value in statistical analysis.

Regression Equation

A formula derived from regression analysis that predicts the dependent variable based on one or more independent variables.

Predicted Values

The outcomes forecasted by a statistical model, which represent the model's estimation of the dependent variable based on independent variable(s).

Standardized Residuals

Residuals normalized to have a mean of zero and a standard deviation of one, used in regression analysis to identify outliers.