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The density of water at 20°C is 998 kg/m3 and at 40°C 992 kg/m³. The coefficient of volume expansion of water is
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- 10–4/°C
- 3 × 10–4/°C
- 2 × 10–4/°C
- 6 × 10–4/°C
Correct Option: B
From question,
∆ρ = (998 – 992) kg/m³ = 6 kg/m³
| ρ = | kg/m³ = 995 kg/m³ | |
| 2 |
| ρ = | ||
| v |
| ⇒ | = | ⇒ |  | | = | | | ||||
| ρ | V | ρ | V |
∴ Coefficient of volume expansion of water,
| = - | = | ≈ 3 × 10-4/°C | ||||||
| V | Δt | ρΔt | 995 × 20 |
