Chemistry S2 Final SY 23-24

Atoms are created.

Atoms are destroyed.

Atoms are rearranged.

Atoms do not move.

Matter cannot be created or destroyed, only change form.

Changing of only the appearance of the object.

Changes affecting the form of a chemical substance, but not what it's made from or how it's made.

Any change that results in the formation of one (or more) new chemical substance(s).

The scientific law states that all matter can be created.

The scientific law states that the number of atoms before and after a chemical reaction will always remain the same.

The scientific law states that all matter can be destroyed.

The scientific law states that the number of atoms before and after a chemical reaction will always change.

It was destroyed during the chemical reaction.

It left the flask as a gas.

It was absorbed by the other chemicals.

It was absorbed by the flask.

2

3

7

12

H₄S₃O

HSO₄

H₂O

H₃SO₄

decomposition

combination

combustion

single replacement

single replacement

synthesis

combustion

decomposition

Thermochemistry

Matter

Conversion

Energy

Energy can change from one form to another.

Energy can cause movement.

Energy can cause a temperature change.

Energy can be completely used up.

a

b

c

d

a

b

c

d

The objects have a difference in thermal mass.

The objects have a difference in potential energy.

The objects have a difference in temperature.

The objects have a difference in total number of particles.

Heat is being transferred from the cold object to the hot object.

Thermal energy is being transferred from the cold object to the warm object.

Thermal energy is being transferred from the hot object to the warm object.

Thermal energy is being transferred from the hot object to the cold object.

Heat flows slowly from one object to the other. Equilibrium has been reached.

Heat flows from the warm object to the hot object. Equilibrium has been reached.

Heat is quickly flowing from one object to the other. Equilibrium has been reached.

Heat has stopped flowing between the objects. Equilibrium has been reached.

In hot water, the water and food coloring particles collided often. As a substance gains thermal energy, it's particles move faster.

In hot water, the water and food coloring particles collided somewhat. As a substance gains thermal energy, it's particles move slightly.

In hot water, the water and food coloring particles collided somewhat often. As a substance gains thermal energy, its particles move hardly at all.

In hot water, the water and food coloring particle rarely collide. As a sumbstance gains thermal energy, the particles are almost motionless.

The molecules are moving faster in diagram A

The molecules are moving at the same rate in both diagrams

The molecules are moving slower in diagram A

More information is required to draw a conclusion about the kinetic energy of particles in either container.

endothermic

exothermic

endothermic

exothermic

cold air, thermal contact

cold air, thermal equilibrium

hot air, thermal contact

hot air, thermal equilibrium

carbon dioxide and argon

nitrogen and oxygen

helium and nitrogen

carbon dioxide and oxygen

Mesosphere

Stratosphere

Thermosphere

Troposphere

billions of metric tons of greenhouse gases

the effects of greenhouse gases

the years included in the graph

the amount of heat trapped by greenhouse gases

millions of metric tons of greenhouse gases

the effects of greenhouse gases

the years included in the graph

the amount of heat trapped by greenhouse gases

Greenhouse gas emissions from buildings in the United States have decreased significantly from 2005 to 2019.

There's little difference between greenhouse gas emissions from buildings and transportations.

Greenhouse gas emissions from power were at an ultimate high in the United States in 2019.

Greenhouse gas emissions from transportation in the United States peaked in 2019.

Whereas we use to use alternative forms of energy in 2005, including solar power, now we primarily use burn fossil fuels to produce electricity, which explain why greenhouse gas emissions peaked in 2019.

In comparison to the Industry Sector, buildings use significantly more fossil fuels for various purposes, including heating up spaces. This explains why Buildings had more greenhouse gas emissions than Industry from 2005 to 2019.

Globalization has increased the demand for transporation and vehicles need gasoline. to work. Gasoline is made from crude oil, a type of fossil fuel, and when it's burned, it produces carbon dioxide. This explains why greenhouse gas emissions from transportation have increased over time.

Given that communities are recycling products more, as opposed to throwing them in landfills to be burned, there has been a notable decrease in greenhouse gas emissions in the "Other" category from 2005 to 2019.

atoms and molecules move in continuous and non-random motion.

atoms and molecules move in continuous and random motion.

the kinetic energies of atoms and molecules decrease with increasing temperature.

the pressure of atoms and molecules is due to the collision of these particles with each other.

When particles pass close enough to one another, their attractions pull them together, and then they bounce apart with no gain or loss of energy.

As particles travel in straight lines, their paths sometimes meet, and then they bounce apart with no gain or loss of energy.

When particles pass close enough to one another, their attractions pull them together, and then they bounce apart with a loss of energy.

As particles travel in straight lines, their paths sometimes meet, and then they bounce apart with a loss of energy.

The cooled balloon shrank because the state of matter of the gas molecules in the balloon changed from gas to liquid.

The cooled balloon shrank because the average kinetic energy of the gas molecules in the balloon decreases when the temperature decreases.

The cooled balloon shrank because the gas molecules escaped when the temperature decreased.

The cooled balloon shrank because the average kinetic energy of the gas molecules in the balloon increases when the temperature decreases.

thermal

mechanical

light

potential

thermal

mechanical

light

sound

electrical

light

thermal

mechanical

sound

electrical

sound

light

sound

electrical

chemical

mechanical