Topic: Thermodynamics
When water at $0^{\circ}C$ is heated, its specific volume under standard atmosphere
- A. First increases then decreases
- B. First decreases then increases
- C. Increases steadily
- D. Decreases steadily
Answer: B. First decreases then increases
Explanation: When water is heated from $0^{\circ}C$, its density first increases until it reaches a maximum at $4^{\circ}C$, and then it decreases. Since specific volume is the reciprocal of density ($V \propto 1/\rho$), the specific volume will first decrease (up to $4^{\circ}C$) and then increase upon further heating.