Practice question

Given: Calculate the heat required to raise the temperature of 40 g of ethanol from 25°C to 35°C (specific heat of ethanol = 2.46 J/g · K). These values define the system as per NCERT data. Formula: q = m × c × Δ T. This is the standard NCERT relation for this phenomenon. Substitution & Calculation: m = 40 g, c = 2.46 J/g · K, Δ T = 35 - 25 = 10 K. q = 40 × 2.46 × 10 = 984 J = 0.984 kJ. Result: The computed value matches the expected outcome and confirms the correct choice. Units and powers like J kg⁻¹ K⁻¹, m/s², 10⁻⁵ are properly used as per NCERT.