A Common Laboratory Reaction Is the Neutralization of an Acid

question 20

Multiple Choice

A common laboratory reaction is the neutralization of an acid with a base. When 50.0 mL of 0.500 M HCl at 25.0°C is added to 50.0 mL of 0.500 M NaOH at 25.0°C in a coffee cup calorimeter, the temperature of the mixture rises to 28.2°C. What is the heat of reaction per mole of acid? Assume the mixture has a specific heat capacity of 4.18 J/(g·K) and that the densities of the reactant solutions are both 1.00 g/mL.

• A)670 J
• B)1300 J
• C)27 kJ
• D)54 kJ
• E)> 100 kJ

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Definitions:

Apparent Authority

The impression given by a principal to a third party that an agent has the authority to act on the principal’s behalf.

Agency Relationship

A legal relationship wherein one party, the agent, is authorized to act on behalf of another party, the principal, in business transactions.

Consideration

In contract law, consideration refers to something of value that is exchanged between parties as part of an agreement, making the contract legally binding.

Apparent Authority

A situation where a person appears to have been given the power by a business to act on its behalf, even if no formal authority has been granted.