U2.L4: Endothermic and Exothermic

Presentation

•

Science

•

7th Grade

•

Practice Problem

•

Easy

Kristin Rowe

Used 14+ times

FREE Resource

29 Slides • 17 Questions

Drag and Drop

When the hand warmer is activated

energy is converted into

energy. This makes the particles in the hand warmer vibrate

. When you hold it, the particles in the hand warmer bump into the particles in your hand. Kinetic energy is transferred from the hand warmer which has

energy to your skin which has

. You feel this as heat.

Drag these tiles and drop them in the correct blank above

chemical

thermal

faster

slower

light

less

mechanical

electrical

Multiple Select

Which reactions caused an INCREASE in temperature? Choose all that apply.

A: Baking soda and vinegar

B: Copper sulfate and aluminum

C: Calcium chloride and water

D: Ammonium nitrate and water

Poll

Which reaction do you think would be the best candidate for our egg incubator?

Draw

Draw an arrow between the thermometer and the chemical reaction to show the direction of energy transfer in each reaction.

Dropdown

This model shows an

reaction. When the atoms rearrange in the reaction,

energy is absorbed than is released so the temperature goes

Dropdown

This model shows an

reaction. When the atoms rearrange, more energy is

into the surroundings than is absorbed, so the temperature goes

Multiple Choice

Is Reaction A, baking soda and vinegar, endothermic or exothermic?

endothermic

exothermic

Multiple Choice

Is Reaction B, copper sulfate and aluminum, endothermic or exothermic?

endothermic

exothermic

Multiple Choice

Is Reaction C, calcium chloride and water, endothermic or exothermic?

endothermic

exothermic

Multiple Choice

Is Reaction D, ammonium nitrate and water, endothermic or exothermic?

endothermic

exothermic

Poll

Compared to 1Rxn:1Food, what do you predict will happen to the temperature of the FOOD when the REACTION is doubled (2 heat packs)?

The temperature of the food will not change.

The temperature will increase more than before.

The temperature will increase, but not by not by as much as before.

The food temperature will decrease.

Multiple Choice

Which model demonstrates the energy transfer when the reaction is doubled?

Open Ended

Explain the model.

Type response here

Poll

Compared to 1Rxn:1Food, what do you predict will happen to the temperature of the food when the FOOD is doubled (with 1 heat pack)?

The temperature of the food will stay the same.

The temperature will increase more.

The temperature will increase, but not by not by as much.

The temperature of the food will decrease.

Multiple Choice

Which model demonstrates the energy transfer when the food is doubled?

Open Ended

Explain the model.

Type response here

Open Ended

Next class, we will begin to design our egg incubators. How could we apply what we have learned today to our egg incubators?

Type response here

Show answer

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