Question

describe how mass is conserved as a substance changes state from solid to liquid to gas?
write the equation for working out change in thermal energy?

Answer 1

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Describe how mass is conserved as a substance changes state from solid to liquid to gas?

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• The particles in a substance stay the same when it changes state - only their closeness, arrangement or motion change. This means that the mass of the substance stays the same. For example, 10 g of water boils to form 10 g of steam, or freezes to form 10 g of ice. This is called conservation of mass.

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Write the equation for working out change in thermal energy?

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• The equation in thermal energy is ΔQ = m × c × ΔT

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Answer 2

Answer:

Question:

Describe how mass is conserved as a substance changes state from solid to liquid to gas?

Answer:

The particles in a substance stay the same when it changes state - only their closeness, arrangement or motion change. This means that the mass of the substance stays the same. For example, 10 g of water boils to form 10 g of steam, or freezes to form 10 g of ice. This is called conservation of mass.

Question:

Write the equation for working out change in thermal energy?

Answer:

The equation in thermal energy is ΔQ = m × c × ΔT

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