Two Solutions,initially at 24

question 132

Multiple Choice

Two solutions,initially at 24.60°C,are mixed in a coffee cup calorimeter.When a 100.0 mL volume of 0.100 M AgNO₃ solution is mixed with a 100.0 mL sample of 0.200 M NaCl solution,the temperature in the calorimeter rises to 25.30°C.Determine the DH°_rxn for the reaction as written below.Assume that the density and heat capacity of the solutions is the same as that of water.
NaCl(aq) + AgNO₃(aq) → AgCl(s) + NaNO₃(aq) DH°_rxn = ?

• A) -35 kJ
• B) -59 kJ
• C) -250 kJ
• D) -16 kJ
• E) -140 kJ

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Definitions:

Probability Assignment

An academic or educational task involving the calculation or analysis of probabilities concerning certain events or scenarios.

Legitimate

Something that is lawful, justified, and recognized as valid or conforming to established rules and standards.

Joint Frequency Distribution

A statistical representation showing the frequency of combined occurrences of two or more variables.

Contingency Table

A tool used in statistics to analyze and display the frequency distribution of variables, showing the number of observations for each combination of categories.