Several Groups of General Chemistry Lab Students Measured the Equilibrium $\Delta$

question 129

Multiple Choice

Several groups of general chemistry lab students measured the equilibrium constant for the same chemical equilibrium. In comparing their results, they found that they had different values because the temperatures of the experiments were different. Everyone was disappointed by the inconsistency, except for Dexter when he realized the measurements were made at different measured temperatures: "My esteemed colleagues," he said, "together we have sufficient data to determine two additional thermodynamic parameters and show the lab instructor what we know!" What two parameters did Dexter have in mind?

• A) (\(\Delta\)G\(\degree\)and \(\Delta\)H\(\degree\))
• B) (\(\Delta\)G\(\degree\) and \(\Delta\)S\(\degree\))
• C) (\(\Delta\)H\(\degree\)and \(\Delta\)S\(\degree\))
• D) (\(\Delta\)E\(\degree\)and \(\Delta\)S\(\degree\))
• E) (This cannot be determined, because there are no two thermodynamic parameters related to K and T.)

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Definitions:

Average Regression Interval

Average regression interval describes the range within which the average value of the dependent variable falls, based on a linear regression model.

X Versus Y Correlation Interval

A range of values that estimates the strength and direction of the linear relationship between two variables.

Prediction Interval Estimate

An estimate of an interval in which future observations will fall, with a certain probability, given what has already been observed.

Confidence Interval Estimate

A range of values defined so that there is a specified probability that the value of a parameter lies within it.