7.2 - 1 Thermal Energy in Chemical Reactions

Two chemicals were combined in a flask and the flask turned cold. This indicates what type of chemical reaction?

• Endothermic reaction

• Exothermic reaction

• Temperature reaction

• Physical reaction

Tags

NGSS.HS-PS1-4

You have been given the task of designing a heat pack to relieve soreness in muscles by combining oxygen and iron. The more oxygen that is added to iron, the more it will heat up. Which of the following temperature changes would you be looking for?

• You should not expect a temperature change because this is a physical reaction.

• An increase in temperature, showing an endothermic reaction

• An increase in temperature, showing an exothermic reaction

• There will not be a reaction.

Tags

NGSS.HS-PS1-4

NGSS.HS-PS1-5

When energy from the Sun interacts with matter on Earth.

• Chemical reaction

• Photosynthesis

• Endothermic

• Thermal energy

Tags

NGSS.MS-LS1-6

NGSS.MS-LS1-7

During a chemical reaction, from where is the energy stored or released?

• The atoms

• The protons in the nucleus

• The nucleus

• The bonds between atoms

Tags

NGSS.HS-PS1-4

The process by which one or more substances change to produce one or more different substances

• Photosynthesis

• Exothermic

• Chemical reaction

• Endothermic

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-4

A chemical reaction or process that releases heat

• Endothermic

• Chemical reaction

• Photosynthesis

• Exothermic

Tags

NGSS.HS-PS1-4

Thermal energy

• A chemical reaction or process that releases heat

• The total kinetic (motion) energy of the tiny particles that make up matter.

• The process by which one or more substances change to produce one or more different substances

• When energy from the Sun interacts with matter on Earth.

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-4

If the reactants have more energy than the products, what type of chemical reaction will occur?

• Exothermic reaction

• Only a physical change will occur.

• Endothermic reaction

• There will not be a reaction.

Tags

NGSS.HS-PS1-4

Endothermic

• The process by which one or more substances change to produce one or more different substances

• A chemical process or reaction that absorbs heat from the surroundings

• The total kinetic (motion) energy of the tiny particles that make up matter.

• When energy from the Sun interacts with matter on Earth.

Tags

NGSS.HS-PS1-4

A campfire is an example of a(n) –

• Physical reaction

• Endothermic reaction

• Exothermic reaction

• Temperature reaction

Tags

NGSS.HS-PS3-4