What are intermolecular forces?

Physical Sciences Test 1 Complete

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•
Physics
•
11th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
Back
Intermolecular forces are the forces of attraction or repulsion between neighboring particles (molecules, atoms, or ions). They play a crucial role in determining the physical properties of substances, such as boiling and melting points.
2.
FLASHCARD QUESTION
Front
How do intermolecular forces affect boiling points?
Back
Substances with stronger intermolecular forces generally have higher boiling points because more energy is required to overcome these forces during the phase change from liquid to gas.
3.
FLASHCARD QUESTION
Front
What is the significance of comparing H₂O and CH₄ in terms of intermolecular forces?
Back
H₂O has strong hydrogen bonds (a type of intermolecular force), while CH₄ has weak London dispersion forces. This significant difference in intermolecular forces leads to a much higher boiling point for H₂O compared to CH₄.
4.
FLASHCARD QUESTION
Front
What is Newton's law of universal gravitation?
Back
Newton's law of universal gravitation states that every point mass attracts every other point mass in the universe with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.
5.
FLASHCARD QUESTION
Front
What is the formula for gravitational force according to Newton's law?
Back
6.
FLASHCARD QUESTION
Front
What happens to gravitational force if the distance between two masses increases?
Back
If the distance between two masses increases, the gravitational force decreases, as it is inversely proportional to the square of the distance.
7.
FLASHCARD QUESTION
Front
What is the effect of increasing the mass of a star on the gravitational force it exerts on a planet?
Back
If the mass of a star increases, the gravitational force it exerts on a planet also increases, as gravitational force is directly proportional to the mass of the objects.
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