The water was heated by 10 degrees Celsius, spending 4.20 * 10 ^ 3 J of heat. Determine the amount of water

To find the value of the amount (mass) of heated water, we use the formula: Q = Sv * mw * Δt, whence we express: mw = Q / (Sv * Δt).

Variables and constants: Q – heat consumption (Q = 4.2 * 10 ^ 3 J); St. – beats heat capacity of water (Sv = 4.2 * 10 ^ 3 J / (kg * K)); Δt – change (growth) of temperature (Δt = 10ºС).

Let’s calculate: mw = Q / (Sv * Δt) = 4.2 * 10 ^ 3 / (4.2 * 10 ^ 3 * 10) = 0.1 kg.

Answer: The amount (mass) of water is 100 g.