It's possible to boil water by adding hot rocks to it, a technique that has been used in many societies over time. If you heat a rock in the fire, you can easily get it to a temperature of 500^@C. If you use granite or other similar stones, the specific heat is about 800 J/(kg*K).If 5.0 kg of water at 10^@C is in a leak-proof vessel, what minimum number of 1.0 kg stones must be added to bring the water to a boil?

Reyna Mccarthy

Reyna Mccarthy

Answered question

2022-12-01

It's possible to boil water by adding hot rocks to it, a technique that has been used in many societies over time. If you heat a rock in the fire, you can easily get it to a temperature of 500C. If you use granite or other similar stones, the specific heat is about 800 J / ( k g K ).If 5.0 kg of water at 10∘C is in a leak-proof vessel, what minimum number of 1.0 kg stones must be added to bring the water to a boil?

Answer & Explanation

Clarence Terrell

Clarence Terrell

Beginner2022-12-02Added 13 answers

Answer:
6
Explanation:
m = Mass
c = Specific heat
Δ T= Change in temperature
s denotes stone
Heat is given by
Q = m c Δ T Q = 5 × 4180 × ( 100 10 ) Q = 1881000 J
Heat for the stone
Q = m s c s Δ T 1881000 = m s 800 × ( 500 100 ) m s = 1881000 800 × ( 500 100 ) m s = 5.878125 k g
Number of stones is given by
n = 5.878125 1 n 6
The number of stones is 6

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