The Temperature Rises from 25

question 114

Multiple Choice

The temperature rises from 25.00 °C to 29.00 °C when 3.50 g of sucrose undergoes combustion in a bomb calorimeter. Calculate Δ_rU for the combustion of sucrose in kJ mol^-1 sucrose. The heat capacity of the calorimeter is 4.90 kJ °C^-1. The molar mass of sugar is 342.3 g mol^-1.

• A)-1.92 × 10³ kJ mol^-1
• B)1.92 × 10³ kJ mol^-1
• C)-1.23 × 10³ kJ mol^-1
• D)2.35 × 10⁴ kJ mol^-1

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Definitions:

45-90 Degrees

A range of angles often referred to in various contexts, such as in geometry, physics, physical therapy, and ergonomics, implying a spectrum from acute to right angles.

Months

Units of time in calendars, typically involving a period of approximately 30 days or four weeks.

Hold Bottle

The action of supporting a feeding bottle during infant feeding to control the flow of milk or formula.

Months

Units of time, typically used to measure periods closer to the length of the natural period related to the motion of the Moon; each month roughly corresponds to one cycle of the moon's phases.