Thermochemistry

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What is Entropy Change?

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Entropy change (ΔS) is a measure of the disorder or randomness in a system. It indicates how much energy in a system is unavailable to do work.

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What does ΔH represent in thermochemistry?

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ΔH represents Enthalpy, which is the total heat content of a system.

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What does the 1st Law of Thermodynamics state?

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The 1st Law of Thermodynamics states that energy can be converted from one form to another, but it cannot be created or destroyed.

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What is Collision Theory?

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Collision Theory is a theory that states that bonds are broken when molecules collide with enough energy and the correct orientation to form products.

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What is specific heat?

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Specific heat is the amount of heat needed to raise the temperature of 1 gram of a substance by 1°C.

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What is the relationship between heat and temperature change?

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Heat is the energy transferred to or from a substance that causes a temperature change.

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What is an endothermic reaction?

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An endothermic reaction is a chemical reaction that absorbs heat from its surroundings.

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What is an exothermic reaction?

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An exothermic reaction is a chemical reaction that releases heat to its surroundings.

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What is the significance of the Zeroth Law of Thermodynamics?

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The Zeroth Law of Thermodynamics states that if two systems are in thermal equilibrium with a third system, they are in thermal equilibrium with each other.

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What is the formula for calculating heat transfer?

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The formula for calculating heat transfer is q = m × c × ΔT, where q is heat, m is mass, c is specific heat, and ΔT is the change in temperature.