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What is the zeroth law of thermodynamics?
If two systems are in thermal equilibrium with a third, they are in equilibrium with each other — basis of thermometry
What is the first law of thermodynamics?
Energy is conserved — ΔU = Q - W (internal energy = heat added - work done by system)
What is the second law of thermodynamics?
Heat flows spontaneously from hot to cold; entropy of universe always increases
What is entropy?
A measure of disorder or randomness in a system — always increases in spontaneous processes
What is a heat engine?
A device that converts heat energy into mechanical work — e.g. steam engine, car engine
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