Definition of First Law

[Drew Myers 4G]

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

[Callum Guo 1H]

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]

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

[AronCainBayot2K]

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

[Celine 1F]

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

[John Liang 2I]

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]

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

[Isabella Dal Porto 1H]

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

[Vivianvelazquez_1J]

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]

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