The Standard Enthalpy of Formation of RbF(s)is -557

question 48

Multiple Choice

The standard enthalpy of formation of RbF(s) is -557.7kJ/mol and the standard enthalpy of formation of RbF(aq,1 m) is -583.8 kJ/mol.Determine the enthalpy of solution of RbF and indicate whether the solution temperature will increase or decrease when RbF is dissolved in water.

• A) -26.1 kJ/mol; increase
• B) 26.1 kJ/mol; increase
• C) -26.1 kJ/mol; decrease
• D) +1141.5 kJ/mol; increase
• E) -1141.5 kJ/mol; decrease

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Definitions:

Sensitivity Analysis

A method for assessing the impact of varying levels of an independent variable on a specific dependent variable, assuming certain conditions.

Cost Structure

The composition of a company’s costs, including the ratio of fixed to variable costs and how these affect overall profitability.

Fixed Costs

Regardless of production or sales volumes, certain costs, like rent, salaries, and insurance, do not vary.

Variable Costs

Costs that vary directly with the level of production or sales volume, such as raw materials and direct labor.