What Is the Enthalpy Change (In KJ)of a Chemical Reaction

question 42

Multiple Choice

What is the enthalpy change (in kJ) of a chemical reaction that raises the temperature of 250.0 ml of solution having a density of 1.25 g/ml by 7.80°C? (The specific heat of the solution is 3.74 j/g ∙ K. )

• A)-7.43 kJ
• B)-12.51 kJ
• C)8.20 kJ
• D)-9.12 kJ
• E)6.51 kJ

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Definitions:

10% More

Indicates an increase or addition of ten percent to a given number or value.

7% Less

A reduction by seven percent from a previous amount or value.

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