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

question 79

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^oC to 33.20^oC. 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

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Definitions:

Iris

The colored part of the eye surrounding the pupil, responsible for controlling the diameter and size of the pupil and thus the amount of light reaching the retina.

Lens

An optical device that bends and focuses light rays, used in glasses, cameras, and various optical instruments.

Ophthalmoscope

A tool used by healthcare professionals to examine the interior of the eye, including the retina and optic nerve.

Optic Chiasm

An X-shaped structure formed by the crossing over of the optic nerves, allowing visual information from both eyes to be processed by both hemispheres of the brain.