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3 years ago

A heating curve has two flat lines, or plateaus. What does the plateau at the lower temperature represent?

Chemistry

2 answers:

masya89 [10]3 years ago

8 0

Answer:

B) Melting of a solid.

Explanation:

Kindly, see the attached image.

It is known that the substance has different 3 phases (solid, liquid, and gas).

By heating, the substance converted from solid phase to liquid phase passing by a plateau that represents equilibrium between the two phases.

By further heating, the solid completely converted into liquid phase, then converted to gaseous phase passing by a plateau that represents an equilibrium between the liquid an gaseous phase.

The plateau at the lower temperature represent: B) Melting of a solid.

Vitek1552 [10]3 years ago

3 0

Answer:

B. Melting of a Solid

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3 years ago

What is the weight of a 90kg man standing on the moon, where gmoon = 1.64 m/s2?

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Weight is called the action exerted by the force of gravity on the body.

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The formula that allows you to calculate the weight of any body is:

W = m*g

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W = weight measured in N.
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In this case, the mass m has a value of 90 kg and the gravity g has a value of 1.64 m/s², which is the value of the acceleration of gravity of the moon. Then:

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