Practice question

Given: How much heat is required to raise the temperature of 0.2 kg of silver from 30° C to 50° C ? (Specific heat of silver = 236.1 J kg^{-1 K^{-1 ) These values define the system as per NCERT data. Formula: Δ Q = m s Δ T. This is the standard NCERT relation for this phenomenon. Substitution & Calculation: m = 0.2, s = 236.1, Δ T = 50 - 30 = 20 . Δ Q = 0.2 × 236.1 × 20 = 944.4 J approx 944 J . 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.