Energy Chemistry

CHEMICAL ENERGY IS A KIND OF...

• POTENTIAL ENERGY

• POLAR VORTEX

• SOLAR ENERGY

• HYDRO

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NGSS.MS-PS3-2

CHEMISTRY IS DEFINED AS A STUDY OF...

• ENERGY

• CARBOHYDRATES

• PEOPLE

• ACIDS

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NGSS.HS-PS1-4

NGSS.HS-PS1-5

NGSS.HS-PS1-7

• A

• B

• C

• D

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NGSS.HS-PS4-1

Some possible electron transitions in a hydrogen atom are shown below. Which letter represents the electron transition with the highest energy in the emission spectrum?

• A

• B

• C

• D

Tags

NGSS.HS-PS4-3

• The arrows represent the transition of electrons to different energy levels when heat is supplied

• The arrows of W represent emission in the UV region

• The smallest arrow of X represents a violet line in the emission spectrum

• The arrows of Y represent emission of electromagnetic waves with higher energy than those represented by X and W

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3

• Line M has a higher energy than line N

• Line N has a lower frequency than line M

• Line M has a longer wavelength than line N

• Lines converge at lower energy

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3

NGSS.HS-PS4-4

Which electronic transition in a hydrogen atom release the most energy?

• n = 1 --> n = 2

• n = 7 --> n = 6

• n = 6 --> n = 7

• n = 2 --> n = 1

Which transition in the hydrogen emission spectrum corresponds to the first ionisation energy of hydrogen?

• n = ∞ --> n = 1

• n = 2 --> n = 1

• n = ∞ --> n = 2

• n = 4 --> n = 2

Tags

NGSS.HS-PS4-3

What is the primary source of chemical energy in a fuel cell?

• Hydrogen

• Oxygen

• Nitrogen

• Carbon Dioxide

Which of the following processes involves the conversion of chemical energy into electrical energy?

• Photosynthesis

• Combustion

• Electrolysis

• Respiration