Question

How does heating generally affect the density ρ of a substance in terms of γ and temperature change ΔT?

Options

• ρ_T ≈ ρ₀(1 + γΔT)

• ρ_T ≈ ρ₀(1 + 3γΔT)

• ρ_T ≈ ρ₀(1 − 3γΔT)

• ρ_T ≈ ρ₀(1 − γΔT)

Answer 1

ρ_T ≈ ρ₀(1 − γΔT)

Explanation:

When a substance is heated, its volume increases but its mass stays the same. Since density is ρ = \[\frac{m}{V}\]​, an increase in volume causes the density to decrease.