Calculate the Enthalpy of Solution for the Dissolution of Sodium

question 131

Multiple Choice

Calculate the enthalpy of solution for the dissolution of sodium chloride, NaCl, molar mass = 58.443 g mol^-1. When 6.93 g of NaCl is dissolved in a coffee cup calorimeter containing 100.0 mL of water the temperature dropped from 23.5 °C to 22.4 °C. The specific heat of water is 4.184 J g^-1 °C^-1, and assume the density of the solution is 1.00 g mL^-1.

• A) -2.8 kJ mol^-1
• B) 3.9 kJ mol^-1
• C) -6.4 kJ mol^-1
• D) 4.1 kJ mol^-1
• E) 6.3 kJ mol^-1

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Definitions:

Bottleneck

A point of congestion in a production system where the demand outpaces the production capacity, leading to delays and reduced throughput.

Cross-Trained Employees

Individuals within an organization who have been trained in multiple skills or tasks, allowing them to perform a variety of roles as needed.

Throughput

The rate at which goods or services are produced or processed in a system.

Break-Even Analysis

A means of finding the point, in dollars and units, at which costs equal revenues.