Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Chemistry > Energy > Flashcards

Energy Flashcards

1
Q

Energy at rest, energy that is stored between bonds in atoms. Potential or kinetic?

A

Potential Energy(PE)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Energy of motion, energy of molecules moving, faster molecules = higher temperature. Potential or kinetic?

A

Kinetic Energy(KE)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Potential or kinetic?
car is off, gas is sitting in tank

A

Potential Energy(PE)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Potential or kinetic?
car is on, gas is burning

A

Kinetic Energy(KE)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Stored in bonds of potential energy, released in chemical reactions such as heat(kinetic energy)
Chemical or thermal?

A

Chemical Energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Comes from heat, responsible for temperature
Chemical or thermal?

A

Thermal Energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Digestion, batteries, and photosynthesis are examples of chemical or thermal?

A

Chemical Energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Boiling water, electricity passing through a metal, and sun radiation are examples of chemical or thermal?

A

Thermal Energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

The energy in the universe is divided into two parts:

A
  1. The system
  2. The surroundings
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the law of conservation of energy?
(aka the 1st law of thermodynamics)

A

Energy cannot be created nor destroyed. It can only change forms

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

The average of the kinetic motion of molecules

A

Temperature

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Temperature ↑ and kinetic energy ↑ makes molecules move?

A

Faster

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Temperature ↓ and potential energy ↑ makes molecules move?

A

Slower

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

The energy(heat) content of a system

A

Enthalpy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What does ΔH represent?

A

Measure of enthalpy change

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What does ΔH depend on?

A

The initial enthalpy of reactants AND final enthalpy of products

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Equation to find enthalpy change

A

ΔH = H products- H reactants

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Energy exits to the environment, feels hot, energy is a product
Exothermic or endothermic?

A

Exothermic reaction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Energy of reactants is greater than energy of products
Exothermic or endothermic?

A

Exothermic reaction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

When bonds form, energy is released, making the molecule more stable
Exothermic or endothermic?

A

Exothermic reaction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

A+B → C +heat
Exothermic or endothermic?

A

Exothermic reaction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Energy is absorbed from the environment, feels cold, energy is a reactant
Exothermic or endothermic?

A

Endothermic reaction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

To break bonds, energy is required
Exothermic or endothermic?

A

Endothermic reaction

24
Q

Energy of the reactants is less than the energy of products
Exothermic or endothermic?

A

Endothermic reaction

25
A+B+heat → C Exothermic or endothermic?
Endothermic reaction
26
System gives away heat, in the form of E made from stable bonds, exothermic reaction Positive or negative ΔH(enthalpy)?
Negative ΔH
27
System is gaining heat, in the form of E to break bonds, endothermic reaction Positive or negativeΔH(enthalpy)?
Positive ΔH
28
In a graph, products end lower than reactants Exothermic or endothermic?
Exothermic reaction
29
In a graph, products end higher than reactants Exothermic or endothermic?
Endothermic reaction
30
CaCO3 + heat → CaO + CO2 Exothermic or endothermic?
Endothermic reaction
31
C3H8 + 5 O2 → 3 CO2 + 4 H2O + 2,200 KJ Exothermic or endothermic?
Exothermic reaction
32
3 H2 + N2 → 2 NH3 + Energy Exothermic or endothermic?
Exothermic reaction
33
The standard unit of energy in metric system (SI unit)
Joule (J)
34
The American system of counting energy
Energy
35
4.18 J = 1.0 cal
Formula for energy
36
The amount of heat required to raise the temperature of 1 gram of a substance by 1℃. Units are J/goC
Specific heat
37
True or false? Substances will heat up faster if they have a lower specific heat.
TRUE (ex. on the common heat capacity chart on formula chart, Bismuth heats up faster because it has a lower specific heat0
38
Formula for calculating energy
Q = m ༝ c ༝ ΔT
39
How much energy is absorbed by 34.4 g of water to heat it from 25.0oC to 78.8oC? The specific heat of water is 4.18 J/goC.
Q = 7,736.0096 J = 7,740 J
40
If 4.50 g of water absorbs 276 J of energy, calculate temperature change of the water. The specific heat of water is 4.18 J/goC.
Q = 14.6730463oC = 14.7oC
41
Law of conservation of energy
Energy cannot be created nor destroyed. It can only change forms. E released = E absorbed
42
1 cal = ____ joules
4.18 J
43
Equipment used to measure the amount of energy stored in a chemical reaction. It prevents heat from escaping or entering the system and enables accurate temperature measurements.
Calorimeter
44
Is melting endothermic or exothermic?
Endothermic
45
Is freezing endothermic or exothermic?
Exothermic
46
Is condensing endothermic or exothermic?
Exothermic
47
Is vaporization endothermic or exothermic?
Endothermic
48
Is sublimation(going from solid to gas w/o going to liquid) endothermic or exothermic?
Endothermic
49
Is deposition endothermic or exothermic?
Exothermic
50
At what temperature does water freeze?
0°C or 32°F
51
At what temperature does ice melt?
0°C or 32°F
52
On a heating curve, where is kinetic energy changing?
Energy in motion
53
On a heating curve, where is potential energy changing?
Energy absorbed
54
Quantity of heat necessary to change 1 g of a solid to a liquid with no temperature change. Heat of fusion or heat of vaporization?
Heat of fusion
55
Quantity of heat necessary to change 1 g of a liquid into a vapor with no temperature change. Heat of fusion or heat of vaporization?
Heat of vaporization
56
Rewrite the following so it's in order 1. The liquid boils 2. The temperature of solid increases 3. The temperature of the liquid increases 4. The solid melts 5. The temperature of gas increases
2, 4, 3, 1, 5

Chemistry (5 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions