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1st rules of thermodynamics/ law of conservation of energy energy can be neither

created or destroyed

E=mc2 Energy = mass x speed of light2

Heat is a form of kinetic energy causes the random movement of atoms and molecules

to increase

Temperature is the average energy of the…

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o The physical state of the substance

o The amount in moles of the substance

o The temperature and pressure

Standard enthalpy change enthalpy change under standard conditions:

o 1 atm pressure

o Stated temperature (usually 25 degrees C)

o All solutions at concentrations of 1 mol dm-3

Hess's law…

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