114.0 g of water is heated using 67.0 W of power,with perfect efficiency.How long will it take to raise the temperature of the water from 15ºC to 25ºC?
A)71 s
B)4.1 s
C)17 s
D)320,000 s

Question

Quizplus · Accepted Answer

The energy required to raise the temperature of water is calculated using the formula Q = mcΔT. For 114 g of water (0.114 kg), with a specific heat capacity (c) of 4,186 J/kg°C, and a temperature change (ΔT) of 10°C, Q = 0.114 kg * 4,186 J/kg°C * 10°C = 4,773.24 J. With a power of 67 W (67 J/s), the time required is Q/P = 4,773.24 J / 67 J/s = 71.24 s, approximately 71 s.

1140 G of Water Is Heated Using 67