Regents Chemistry Unit 3: Question Preview (ID: 19372)


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Which hypothesis states that equal numbers of particles of a gas will occupy equal volume under the same conditions of temperature and pressure?
a) Mendeleev
b) Avogadro
c) Archimedes
d) Aristotle

According to kinetic-molecular theory, what does not exist between gas molecules?
a) Intermolecular attractive forces
b) Hard feelings
c) Ion-ion attractions
d) Cohesivity

According to kinetic-molecular theory (ideal gas behavior), what direction to gas particles move?
a) In a straight line
b) In a vortex
c) In a wave-like pattern
d) Any way they want

Under which conditions do gasses behave most like an ideal gas?
a) Low temperature and high pressure
b) High temperature and high pressure
c) Low temperature and low pressure
d) High temperature and low pressure

Which process is exothermic?
a) Boiling
b) Condensation
c) Melting
d) Sublimation

What term describes the amount of heat energy needed to boil one gram of liquid at the substance’s boiling point?
a) Heat of sublimated
b) Heat of fusion
c) Specific heat
d) Heat of vaporization

Which process is endothermic?
a) Melting
b) Freezing
c) Condensation
d) Sublimation

What term describes the amount of heat energy needed to melt one gram of solid at the substance’s melting point?
a) Heat of evaporation
b) Heat of sublimated
c) Specific heat
d) Heat of fusion

In a phase change diagram, what is occurring when the plotted line is slanted?
a) Kinetic energy is remaining constant
b) Potential energy is decreasing
c) Kinetic energy is increasing
d) Potential energy is increasing

In a phase change diagram, what is occurring when the plotted line has a slope of 0?
a) Potential energy is increasing
b) Kinetic energy is increasing
c) Kinetic energy is decreasing constant
d) Potential energy is remaining constant

When you see the phrase “average kinetic energy of a sample,” this is the same as the
a) Color
b) Potential energy
c) Phase of matter
d) Temperature

If a sample of pure water is at phase equilibrium and the water exists in both the liquid and solid phase, what temperature Celsius must the sample be at?
a) 10 Celsius
b) 32 Celsius
c) 0.0 Celsius
d) 100 Celsius

What process is occurring when a substance changes directly from a gas to a solid?
a) Melting
b) Evaporating
c) Deposition
d) Sublimation

What process is occurring when a substance changes directly from a solid to a gas?
a) Sublimation
b) Melting
c) Evaporating
d) Deposition

What phase of matter are atoms locked into a regular geometric pattern called a crystal lattice?
a) Liquid
b) Gas
c) Plasma
d) Solid

What phase of matter has a definite volume but indefinite shape
a) Liquid
b) Solid
c) Gas
d) Plasma

Substances with strong intermoleculer attractive forces tend to exist in what phase at room temperature?
a) Liquid
b) Solid
c) Gas
d) Plasma

What term is used to describe the forces of attraction that exist between molecules?
a) Intracellular forces
b) Atomic forces
c) Intermolecular attractive forces
d) Solid-solid ion attraction

When solving gas law problems, what units must the temperature be expressed in? Kelvin
a) Celsius
b) Centigrade
c) Kelvin
d) Fahrenheit

In gas law problems, what do the P, V and T stand for?
a) Pounds, Vapor, Toluene
b) Pressure, Volume, and Temperature
c) Percent, Volume, Time
d) Prunes, Vegetables, and Tacos

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