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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Definitions:

Anagenesis

The gradual evolution of a species to a new form, without branching or diversification into multiple species.

Genetic Variation

The diversity in gene frequencies within a population, which is the raw material for evolution by natural selection.

Colder Regions

Geographic areas characterized by low temperatures, often leading to specific adaptations in living organisms and human societies.

Sickle-Cell Anemia

A genetic blood disorder that causes red blood cells to assume a sickle shape, leading to various health complications.