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WorksheetsMIDTERM EXAM - CHEMISTRY 2
Total questions: 25
Worksheet time: 13mins
What is a system of ideas to explain the motion of molecules?
Average kinetic energy
endothermic process
exothermic process
kinetic molecular theory
The force of attraction between molecules is ___.
intermolecular forces
bridge forces
chemical bonds
What is the first assumption of the Kinetic Theory of Matter?
Matter consists of molecules and atoms
Gases are the same in all matter
Matter is the same as kinetic energy
Which statement about the particle theory of matter is true?
The particles in a liquid have more kinetic energy than the particles in a gas
A solid stays in one place because its particles are at rest
When a solid melts its particles no longer exist
The particles that make up matter are too small to see without a microscope
Which type of IMF is responsible for the attraction pictured above?
Dipole-Dipole Interaction
Ion-Dipole Interaction
Hydrogen Bonds
Covalent Bond
Ionic Bond
What information do we look for in the periodic table if we want to examine intermolecular forces?
atomic mass
atomic number
electronegativity
ionization
Which of the following process is exothermic?
Candle was melting
A puddle evaporating
Dry ice (solid carbon dioxide) subliming to form gaseous carbon dioxide
Water freezing to form ice
After making two simplifying assumptions, change in enthalpy is equal to ___
pressure-volume work
pressure on the Earth's surface
the heat gained or lost by the system
the internal energy of the system
You have dropped your popsicle and are watching it become a LIQUID. Which answer BEST explains what PHASE CHANGE has occurred AND how the molecule MOVEMENT has changed?
The PHASE CHANGE that has occurred is CONDENSATION and the molecule MOVEMENT has become FASTER.
The PHASE CHANGE that has occurred is EVAPORATION and the molecule MOVEMENT has become SLOWER.
The PHASE CHANGE that has occurred is MELTNG and the molecule MOVEMENT has become FASTER.
Suppose you pour a glass of ice water and set it on the kitchen table. After a few minutes, the outside of the glass will be covered with drops of water. Why did this happen?
Oxygen in the air cooled and condensed onto the cold glass.
Water vapor in the air cooled and condensed onto the cold glass.
Water vapor in the air cooled and evaporated onto the cold glass.
Water seeped through pores in the glass.
When a gas begins to condense through condensation, what happens to the heat in the particles.
The heat leaves the gas as it condenses.
The heat goes into the gas as it condenses.
The heat stays the same as it condenses.
None of the above.
According to kinetic molecular model, in gases,
The particles are closely packed together, they occupy minimum space and are usually arranged in a regular pattern
The particles occur in clusters with molecules slightly further apart
The molecules are very far apart and occupy all space made available to them
The particles vibrate about fixed positions and are held together by strong intermolecular bonds between them
Intermolecular forces for: NH3
Dispersion Force
Dipole dipole
Hydrogen bonding
Which term describes a solution in which there is LESS than the maximum amount of solute that can be dissolved in a given amount of solvent?
Unsaturated
Saturated
Supersaturated
Homogenous
Which term describes a solution in which there is MORE than the maximum amount of solute that can be dissolved in a given amount of solvent?
Unsaturated
Saturated
Supersaturated
Homogenous
Which of the following can be done to make this sugar dissolve in the water at a faster rate?
Store the solution in a place exposed to light
Cool the solution in a freezer
Increase the amount of sugar
Stir the solution
How does temperature affect the solubility of a solution?
Solubility is not affected by temperature.
Solubility increases with an increase in temperature.
Solubility decreases with an increase in temperature.
Depending on the state of matter, solubility may increase or decrease with an increase in temperature.
