1) Which list includes only bulk properties of matter?(1 point)
kinetic energy, strength of electrical forces, vapor pressure
boiling point, surface tension, vapor pressure
boiling point, strength of electrical forces, vapor pressure
boiling point, kinetic energy, surface tension
2)Substance Boiling Point (ºC)
acetone 56
turpentine 160
propane –43
glycerin 290
In which substance are the electrostatic forces between molecules the strongest? (1 point)
propane
acetone
glycerin
turpentine
3)Which phrase best describes the vapor point of a substance?(1 point)
the amount of heat energy required to change a substance from a liquid to a gas
the strength of the bonds between molecules of a substance that is in a gaseous state
the average kinetic energy of the molecules of a substance in its gaseous state
the temperature at which additional heat energy causes the substance to change from a liquid to a gas
4)Which procedure would produce the best data for comparing the electrostatic forces between the molecules of different substances?(1 point)
Heat each substance in solid form for the same amount of time. Measure the temperature of each substance.
Heat each substance in liquid form for the same amount of time. Measure the temperature of each substance.
Heat each substance in solid form to its melting point. Measure the quantity of each substance that has melted.
Heat each substance in liquid form to its boiling point. Measure the temperature of each substance.
5)A student wants to conduct an investigation on vapor pressure. Which statement describes how vapor pressure is related to an observable phase change?(1 point)
A liquid boils when the vapor pressure equals the atmospheric pressure.
A liquid boils when the vapor pressure equals the boiling point.
A liquid freezes when the vapor pressure equals the melting point.
A liquid freezes when the vapor pressure equals the atmospheric pressure.
1) Which list includes only bulk properties of matter?
Answer: Boiling point, surface tension, vapor pressure
2) In which substance are the electrostatic forces between molecules the strongest?
Answer: Glycerin
3) Which phrase best describes the vapor point of a substance?
the amount of heat energy required to change a substance from a liquid to a gas
Answer: The temperature at which additional heat energy causes the substance to change from a liquid to a gas
4) Which procedure would produce the best data for comparing the electrostatic forces between the molecules of different substances?
Answer: Heat each substance in liquid form to its boiling point. Measure the temperature of each substance.
I didn't have that question for number 5. My 5th question was:
Water melts at 0°C. A student observes a liquid that melts at 10ºC. Which conclusion can the student reasonably draw?
Answer: The electrostatic forces between molecules in the unknown liquid are stronger than the electrostatic forces between water molecules.
100/100 correct
1. boiling point, surface tension, vapor pressure
2. glycerin
3.The electrostatic forces between molecules in the unknown liquid are stronger than the electrostatic forces between water molecules.
4.the temperature at which additional heat energy causes the substance to change from a liquid to a gas.
5. Heat each substance in liquid form to its boiling point. Measure the temperature of each substance.
don't know if you like to work ahead butttt for the next quick check here are the answers
1.Heat energy is added to the substance, weakening the electrical attraction between molecules.
2.Both the melting point and boiling point are lower.
3.The electropositive hydrogen atom in one molecule and an electronegative atom in another molecule experience attraction.
4. dipole
5.Water and ethanol have different molecular structures.
sorry 1. is Heat energy is added to the substance, weakening the electrical attraction between molecules.
^^^ that fool is 100% correct ma doods
Does NO ONE have the unit test answers for Lighthouse connections academy 12th grade? (unit 8) Ik that one teacher is probably doin something with test answers because I can never find them PLEASE SOMEONE POST THEM.
1) To determine which list includes only bulk properties of matter, we need to understand the definitions of the listed properties:
- Kinetic energy: This is the energy of an object due to its motion and is not a bulk property.
- Strength of electrical forces: This refers to the attractive or repulsive forces between charged particles and is not a bulk property.
- Vapor pressure: This is the pressure exerted by a vapor when it is in equilibrium with its liquid phase and is a bulk property.
Looking at the options:
- Option 1: Includes kinetic energy and strength of electrical forces, which are not bulk properties.
- Option 2: Includes boiling point, surface tension, and vapor pressure. Boiling point and surface tension are not bulk properties, but vapor pressure is.
- Option 3: Includes boiling point, strength of electrical forces, and vapor pressure. Boiling point and strength of electrical forces are not bulk properties, but vapor pressure is.
- Option 4: Includes boiling point, kinetic energy, and surface tension. Boiling point and surface tension are not bulk properties, and kinetic energy is not directly related to bulk properties.
So, the correct answer is option 2: boiling point, surface tension, vapor pressure.
2) To determine in which substance the electrostatic forces between molecules are the strongest, we need to compare the boiling points. Higher boiling points indicate stronger intermolecular forces, including electrostatic forces.
Looking at the boiling points of the substances:
- Propane: -43 ºC
- Acetone: 56 ºC
- Glycerin: 290 ºC
- Turpentine: 160 ºC
Among these, glycerin has the highest boiling point (290 ºC), indicating stronger electrostatic forces between its molecules. Therefore, the answer is glycerin.
3) To describe the vapor point of a substance, we must understand the definition of vapor pressure. It is the pressure exerted by the vapor of a substance when it is in equilibrium with its liquid or solid phase at a given temperature. The answer should reflect this definition.
Among the given options, the correct answer is:
- The vapor point of a substance is the temperature at which additional heat energy causes the substance to change from a liquid to a gas.
This statement accurately describes the phase change from a liquid to a gas, which occurs when the temperature reaches the vapor point, allowing more heat energy to convert the substance into gas.
4) To compare the electrostatic forces between the molecules of different substances, we need to design a procedure that provides relevant data. The key is to measure the temperature at which these forces are most prominent.
Among the given options, the best procedure for comparing electrostatic forces is:
- Heat each substance in liquid form to its boiling point. Measure the temperature of each substance.
By heating each substance to its boiling point, we ensure that the intermolecular forces, including electrostatic forces, are at their maximum. Additionally, measuring the temperature at this point allows us to compare and analyze differences in the strength of these forces.
5) To understand how vapor pressure is related to an observable phase change, we need to know the specific conditions under which a phase change occurs.
The correct statement that describes this relationship is:
- A liquid boils when the vapor pressure equals the atmospheric pressure.
When the vapor pressure of a liquid becomes equal to the pressure exerted by the surrounding atmosphere (atmospheric pressure), the liquid begins to form vapor bubbles throughout its volume. At this point, the liquid is boiling and undergoing a phase change from a liquid to a gas.
In summary, vapor pressure reaching equilibrium with atmospheric pressure is the condition that triggers boiling in a liquid.
kinetic energy
IS NOT a bulk property
strength of electrical forces
IS NOT a bulk property