In a Flask, 114 $67.0 \mathrm {~W}$ Of Power, with Perfect Efficiency

Multiple Choice

In a flask, 114.0 g of water is heated using $67.0 \mathrm {~W}$ of power, with perfect efficiency. How long will it take to raise the temperature of the water from $15 ^ { \circ } \mathrm { C }$ to $25 ^ { \circ } \mathrm { C } ?$ The specific heat of water is 4186 J/kg ? K.

A) 71 s
B) 4.1 s
C) 17 s
D) 320,000 s