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5. short answer question (30 words)
1) how does the movement of particles in solids, liquid and gas depend upon the kinetic energy.
2) how does the kinetic energy of the particles of a solid change when heated
3)define the law of conservation of mass also give an example to prove it
4) why do gases have low densities
Answers
Explanation:
1. The attractive force in solids need not be stronger than in liquids or gases. ... Attractive forces don't get weaker when a substance moves from the solid to the liquid to the gas state, rather the kinetic energy of the particles increases (implying faster motion), allowing them to overcome the attractive forces.
2. When a solid is heated, its atoms vibrate faster about their fixed points. ... Heat causes the molecules to move faster.
3. The law of conservation of mass states that matter cannot be created or destroyed in a chemical reaction.
4.because the particles of gases are not compressed tightly as in solid or liquid.
Explanation:
1) The attractive force in solids need not be stronger than in liquids or gases. ... Attractive forces don't get weaker when a substance moves from the solid to the liquid to the gas state, rather the kinetic energy of the particles increases (implying faster motion), allowing them to overcome the attractive forces.
2) When a solid is heated, its atoms vibrate faster about their fixed points. ... Heat causes the molecules to move faster, (heat energy is converted to kinetic energy ) which means that the volume of a gas increases more than the volume of a solid or liquid.
3) The law of conservation of mass states that matter cannot be created or destroyed in a chemical reaction. For example, when wood burns, the mass of the soot, ashes, and gases, equals the original mass of the charcoal and the oxygen when it first reacted.
4) Gases usually tend to have a low density mainly because the intermolecular force of attraction better the gas molecules is very low. As a result, they move all over the place which further leads to the generation of larger inter-molecular spaces.
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