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lora16 [44]
3 years ago
10

If a reaction starts with 30 grams how many should it end with?

Physics
2 answers:
Artemon [7]3 years ago
7 0
Thirty grams is how many
GrogVix [38]3 years ago
6 0
30 grams because of conservation
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What does Newtons first law of motion say about objects at rest and objects in motion?
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Answer:

Explanation:

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In grinding a steel knife blade (specific heat = 0.11 cal/g-c),the metal can get as hot as 400C. If the blade has a mass of 80g,
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Answer:

33 g.

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Assuming no heat transfer can be possible except for heat exchange between water and steel, we can say that the heat lost by the knife, must be equal to the heat gained by the water.

As we have a limit for the maximum temperature of both elements (once reached a final thermal equilibrium), of 100ºC, which means that the maximum allowable change in temperature will be of 300º C for the knife, and of 80º C for the water.

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So, we can write the following equation:

cs*mk*Δtk = cw*mw*Δtw

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Solving for mw = 2,640 cal / 80 cal/g =33 g.

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