t1 = 15 ° C.
t2 = 100 ° C.
C = 4200 J / kg * ° С.
Q = 178.5 kJ = 178500 J.
The amount of heat Q required for heating water is expressed by the formula: Q = C * m * (t2 – t1).
m = Q / C * (t2 – t1).
m = 178500 J / 4200 J / kg * ° C * (100 ° C – 15 ° C) = 0.5 kg.
Answer: m = 0.5 kg of water can be heated to boiling.
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