Laws of Thermodynamics

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What is the First Law of Thermodynamics?

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The First Law of Thermodynamics states that energy cannot be created or destroyed, only transformed from one form to another. It is often expressed as ΔU = Q - W, where ΔU is the change in internal energy, Q is the heat added to the system, and W is the work done by the system.

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What is the Second Law of Thermodynamics?

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The Second Law of Thermodynamics states that in any energy transfer, the total entropy of a closed system can never decrease over time. It implies that natural processes tend to move towards a state of disorder or randomness.

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What is entropy?

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Entropy is a measure of the disorder or randomness in a system. Higher entropy indicates a greater degree of disorder.

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What is a calorimeter?

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A calorimeter is a device used to measure the amount of heat involved in a chemical reaction or other processes.

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What happens to energy in an isolated system?

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In an isolated system, the total energy remains constant; energy can neither enter nor leave the system.

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What is heat transfer?

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Heat transfer is the movement of thermal energy from one object or substance to another due to a temperature difference.

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What is the relationship between heat lost and heat gained in a calorimeter?

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In a calorimeter, the heat lost by one object is equal to the heat gained by another object, assuming no heat is lost to the surroundings.

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What is the formula for calculating work done by a system?

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The work done by a system can be calculated using the formula W = PΔV, where W is work, P is pressure, and ΔV is the change in volume.

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What is the Third Law of Thermodynamics?

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The Third Law of Thermodynamics states that as the temperature of a system approaches absolute zero, the entropy of a perfect crystal approaches zero.

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What is thermal equilibrium?

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Thermal equilibrium is the state in which two objects in contact with each other reach the same temperature and no heat flows between them.