The energy content of a Big Mac is 540 Cal. How much water can be heated from 20°C to 90°C by this amount of energy? (c_P(water) = 1.00 g/mL, c_s(water) = 4.18 J/(g · °C), 1 Cal = 1000 cal = 4.184 kJ)

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Quizplus · Accepted Answer

The energy required to heat water is calculated using the formula q = mcΔT. Converting 540 Cal to joules gives 540,000 cal or 2,260,560 J. Using the specific heat capacity of water, the mass of water that can be heated from 20°C to 90°C is calculated to be approximately 7.7 kg, which is equivalent to 7.7 L.

The Energy Content of a Big Mac Is 540 Cal