Q1 (H.Chem) Midterm Review (Due day of Final)

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What is a homogeneous mixture?

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A homogeneous mixture is a mixture that has a uniform composition throughout. The individual components are not distinguishable and are evenly distributed.

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What is a heterogeneous mixture?

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A heterogeneous mixture is a mixture where the individual components are distinct and can be easily identified. The composition is not uniform.

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Define a pure substance.

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A pure substance is a material that has a constant composition and consistent properties throughout. It can be an element or a compound.

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What is an intensive property?

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An intensive property is a property that does not depend on the amount of substance present. Examples include color, density, and boiling point.

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What is an extensive property?

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An extensive property is a property that depends on the amount of substance present. Examples include mass, volume, and total energy.

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What is a compound?

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A compound is a pure substance made of two or more different elements that are chemically bonded together.

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What is the difference between a mixture and a compound?

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A mixture is a combination of two or more substances that are not chemically bonded, while a compound is a substance formed when two or more elements are chemically bonded.

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How do you convert grams to kilograms?

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To convert grams to kilograms, divide the number of grams by 1000. For example, 7254 g = 7.254 kg.

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What happens to potential energy during a phase change?

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During a phase change, the potential energy of particles increases as they absorb energy to change from solid to liquid to gas.

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What happens to kinetic energy during cooling?

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As a substance cools, the kinetic energy of its particles decreases, leading to a reduction in temperature.