An aerosol can of compressed air has the following warning label: “warning: contents under pressure. do not expose can to heat or flame. do not crush can.” using what you know about volume, pressure, and temperature, explain this warning.

Heating the can increases the kinetic energy of the gas molecules.

Increasing the kinetic energy of the gas molecules increases the pressure of the gas on the can.

Crushing the can reduces its volume.

As volume decreases, the pressure inside the can increases because the gas molecules collide with the can’s walls more often.

If the pressure gets too high, the can may explode.

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in chemistry, adhesion and cohesion are attractive forces that exist between molecules. they hold the molecules together from each other. they are different in that adhesive force exists between molecules of different substance while cohesive force happens between molecules of same substance.

adhesion between water and glass causes water molecules at the edge of water and glass interface to climb up the wall in a narrow glass tube. this is called capillary action. cohesion is what gives glass its shape and causes water to form a droplet.

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