Changing the state of matter is usually
result of?

Changing the state of matter of a substance is a physical change. It is usually caused by

changing the temperature or surrounding pressure of a substance. Remember that we said that the

temperature of a substance is related to the speed of the particles' motion. The speed of the

particles determines the state of matter of the substance.

Explanation:

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the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.

air

in a tire you fill a tire with air

then a couple days later you check the air pressure in the tire

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