How to use the formula q = mcΔt?
GeneralClass 12AllAnswered 27 Mar 2026
Answer
To use this heat transfer formula:
- Identify the mass (m) of the substance
- Find specific heat capacity (c) from tables
- Calculate temperature change: Δt = t_final - t_initial
- Multiply: q = m × c × Δt
Example: Heat 100g of water from 20°C to 80°C (c = 4.18 J/g°C): q = 100 × 4.18 × (80-20) = 25,080 J
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