Calculate the Enthalpy of Solution for the Dissolution of Lithium

question 116

Multiple Choice

Calculate the enthalpy of solution for the dissolution of lithium iodide, LiI, molar mass = 133.85 g mol^-1. When 1.49 g of LiI is dissolved in a coffee cup calorimeter containing 75.0 mL of water the temperature increased from 23.5 °C to 25.7 °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) 30 kJ mol^-1
• B) 18 kJ mol^-1
• C) -62 kJ mol^-1
• D) -39 kJ mol^-1
• E) -76 kJ mol^-1

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Definitions:

Extinction

In psychology, the gradual weakening and disappearance of a conditioned response when the conditioned stimulus is no longer paired with the unconditioned stimulus.

Discrimination

Unjust or prejudicial treatment of different categories of people, especially on the grounds of race, age, or sex.

Latent Learning

The process of learning that occurs without any immediate or apparent reinforcement, which becomes apparent only when there is a reason to demonstrate it.

Unconditioned Stimulus

In classical conditioning, a stimulus that naturally and automatically triggers a response without any prior learning.