Problem 16.51 5 of 7 Constants | Periodic Table Part A You\'re arguing with your

Question

Problem 16.51 5 of 7 Constants | Periodic Table Part A You're arguing with your roommate about whether it's quicker to heat water on a stove burner or in a microwave. The burner supplies energy at the rate of 2.0 kW the microwave at 550 W.You can heat water in the microwave in a paper cup of negligible heat capacity, but the stove requires a pan with heat capacity 1.6kJ/K How much water do you need before it becomes quicker to heat on the loss to the surroundings. Express you answer using two significant figures. stovetop? Neglect energy 0.13 kg Previous Answers Incorrect; Try Again: 3 attempts remaining Provide Feedback

Explanation / Answer

Rate of temperature rise, C = (1.6 x 0.550)/(1 - 0.550) = 1.956 kJ/K

So, mass, m = (1.956/4.184) = 0.467 kg (Ans)

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