A 100-G Sample of Octane (C₈H₁₈)is Burned in a Bomb Calorimeter

question 89

Multiple Choice

A 1.00-g sample of octane (C₈H₁₈) is burned in a bomb calorimeter that has a heat capacity of 5.80 kJ/°C.The temperature of the calorimeter rises from 25.00°C to 33.20°C.What is ΔU per mole for the combustion of octane?

• A)-47.6 kJ/mol
• B)-416 kJ/mol
• C)-707 kJ/mol
• D)-5.43 ×10³ kJ/mol
• E)-1.86 ×10⁵ kJ/mol

---

Definitions:

Systematic Bias

Describes a consistent, non-random distortion in data collection, analysis, or interpretation processes that can lead to inaccurate conclusions.

Internal Validity

Refers to the extent to which a study can demonstrate a cause-and-effect relationship between variables, excluding the influence of external factors.

Posttest-Only Control

A research design in which outcomes are measured only after the experiment or intervention, without a pretest comparison.

Posttest-Only Control

A research design in which outcomes are measured only after the experimental intervention, without a pretest, to assess the intervention's effect.