A 100ML Sample of 0 $\rarr$ NH₄Cl(aq)
the Temperature Increase Is 2

question 40

Multiple Choice

A 100.mL sample of 0.200 M aqueous hydrochloric acid is added to 100.mL of 0.200 M aqueous ammonia in a calorimeter whose heat capacity (excluding any water) is 480.J/K. The following reaction occurs when the two solutions are mixed. HCl(aq) + NH₃(aq) $\rarr$ NH₄Cl(aq)
The temperature increase is 2.34°C. Calculate $\Delta$ H per mole of HCl and NH₃ reacted.

• A)154 kJ/mol
• B)1.96 kJ/mol
• C)485 kJ/mol
• D)-1.96 kJ/mol
• E)-154 kJ/mol

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A piece of transparent material with at least one curved surface, used to focus or disperse light and form images.

Iris

The colored part of the eye that controls the size of the pupil and the amount of light reaching the retina.

Colored Part

The iris, the circular structure in the eye responsible for controlling the diameter and size of the pupils and thus the amount of light reaching the retina.

Pupil Size

The diameter of the circular opening in the center of the iris of the eye, which can vary in response to light exposure or emotional state.