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when a gas expands, what is the sign of ? why? when a gas contracts, what is the sign of ? why? what are the signs of and for the process of boiling water?

User Shiva Naru
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1 Answer

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Final answer:

When a gas expands, it has a positive sign (+), and when a gas contracts, it has a negative sign (-). When water boils, it expands with a positive sign (+) and there is no change in temperature.

Step-by-step explanation:

When a gas expands, it has a positive sign (+). This is because expanding means the gas is increasing in volume, which is a positive change. When a gas contracts, it has a negative sign (-). This is because contracting means the gas is decreasing in volume, which is a negative change.

For the process of boiling water, the sign of expansion is positive (+) because the water is changing from a liquid to a gas, which involves an increase in volume. The sign of change in temperature during boiling is zero, meaning there is no change in temperature during this phase transition.

User Alex Jillard
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