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level: Particle Model of Matter

Questions and Answers List

level questions: Particle Model of Matter

QuestionAnswer
What is the Law of Conservation of Mass?No atoms are created or destroyed in a chemical reaction
How to find density of a solid object?Measure mass. If regular solid measure l, w, h and then calculate volume. If irregular, submerge in eureka can, measure volume of water displaced it will equal object's volume. Use density formula with calculated mass and volume
How to find density of a liquid?Measure mass of 10ml of liquid in a measuring cylinder. Add another 10ml and record new mass and volume. Repeat roughly 10 times. Find density of each measurement. Take average of all calculated densities for liquid density.
Arrangement of particles in solidsHeld in fixed regular positions by strong forces of attraction
Arrangement of particles in a liquidForm irregular arrangements as there are weaker forces of attraction
Arrangements of particles in a gasNo structure, free to move in random directions at high speeds as there are almost no forces of attraction
Density in solidsHigh density, particles closest together
Density in liquidsLess dense than solids, particles further apart
Density in gasesLow density, particles freely moving
How is mass conserved during changes of state?No particles are created or destroyed, only particles' arrangement or closeness changes.
Internal energy definitionThe total energy its particles contain in their kinetic and potential energy stores
Specific Heat Capacity definitionAmount of energy needed to raise the temperature of 1kg of a substance by 1degree celcius
Specific Heat Capacity unitJ / kg degrees celcius
Specific Latent Heat definitionEnergy needed to change a 1kg substance's state without changing its temperature
Practice interpreting the heating graphHeating Graph:
Practice interpreting the cooling graphCooling graph: