## Definition of First Law

$\Delta U=q+w$

Drew Myers 4G
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### Definition of First Law

Can someone give a definition of the first law of thermodynamics?

Callum Guo 1H
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### Re: Definition of First Law

It's conservation of energy: energy is can't be created or destroyed. So the total energy of a internal system remains constant.

Vinita Saxena 2I
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### Re: Definition of First Law

Heat energy, like all energy, can't be created or destroyed, also known as conservation of matter.

AronCainBayot2K
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### Re: Definition of First Law

Conservation of energy, a function of heat and work. Delta U= q+w.

Celine 1F
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### Re: Definition of First Law

The first law of thermodynamics discusses conservation of energy. Energy can't be created nor destroyed.

John Liang 2I
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### Re: Definition of First Law

The definition of the first law of thermodynamics is that energy cannot be created nor destroyed. this allows us to calculate the enthalpy of a reaction, predict it using bond energies, etc. hope this helps!

Abigail_Hagen2G
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### Re: Definition of First Law

It's just the one that states the conservation of energy.

Isabella Dal Porto 1H
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### Re: Definition of First Law

Energy is neither created nor destroyed. That is why it is known as conservation of energy.

Vivianvelazquez_1J
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### Re: Definition of First Law

The First Law of Thermodynamics states that heat is a form of energy, and therefore is subject to the principle of conservation of energy. Meaning that heat energy, just like energy cannot be created or destroyed.

SimranSangha4I
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### Re: Definition of First Law

The first law of Thermodynamics states that heat is energy and in relation, cannot be created or destroyed.