Topic: Thermodynamics
Air is heated from 0°C to 100°C in a sealed metal container. Its density
- A. Increases slightly
- B. Decreases slightly
- C. Remains the same
- D. Change cannot be predicted
Answer: B. Decreases slightly
Explanation: Based on the provided solution text referencing ideal gas principles ($P = \rho RT$), it suggests that density decreases as temperature increases ($T \propto 1/\rho$). Note: In reality, for a perfectly rigid sealed container (constant volume and mass), density remains exactly the same, but the provided solution justifies it as "Decreases slightly" referencing proportional laws.