A Hot Air Balloon Has a Volume of 2

question 42

Multiple Choice

A hot air balloon has a volume of 2.00 × 10³ m³ when fully inflated, and the air inside the balloon is always at atmospheric pressure of 1.01 × 10⁵ Pa because of the large opening used to fill the balloon and heat the air inside it. What is the mass of hot air inside the balloon if its temperature is 120°C? The universal gas constant is 8.314 J/mol•K. (Assume a molecular weight of 28.8 g/mol for air.)

• A) 1780 kg
• B) 5850 kg
• C) 203 kg
• D) 62.0 kg

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Definitions:

Return On Investment

A financial ratio measuring the profit earned on an investment relative to its cost, indicating the efficiency of the investment.

Turnover

The rate at which inventory or assets are replaced through sales or use within a given period.

Net Operating Income

A company’s income after operating expenses are subtracted, but before income taxes and interest are calculated.

Residual Income

The amount of income that an individual has after all personal debts, including the mortgage, have been paid.