The Dissolution of Barium Hydroxide in Water Is an Exothermic

question 31

Multiple Choice

The dissolution of barium hydroxide in water is an exothermic process. Which of the following statements is correct?

• A)The enthalpy of solid barium hydroxide plus pure water is less than that of the solution, at the same temperature.
• B)The enthalpy of solid barium hydroxide plus pure water is greater than that of the solution, at the same temperature.
• C)The enthalpy of solid barium hydroxide plus pure water is the same as that of the solution, at the same temperature.
• D)The temperature of the solution is lower than of the barium hydroxide and water before mixing.
• E)When barium hydroxide dissolves in water, the system does work on the surroundings.

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Definitions:

Random Sample

A subset of individuals chosen from a larger population, where each individual has an equal chance of being selected, used to infer population characteristics.

Small Bag

A diminutive container used for carrying personal items or purchases, typically hand-held or shoulder-mounted.

Large-Sample Z

A statistical method used to approximate the significance of difference between means, applicable when sample size is large and variances are known or assumed to be equal.

Corresponding P-Value

The probability of obtaining a test statistic at least as extreme as the one that was actually observed, assuming that the null hypothesis is true.