Thermochemistry Review

What are chemical reactions that absorb energy?

• endothermic

• fast

• slow

• exothermic

Tags

NGSS.HS-PS1-4

The heat required to raise the temperature of a SUBSTANCE by 1∘C

• calorie
• joule
• specific heat
• 4.184 J

Heat flows from _______ to ______ objects

• cooler to warmer
• warmer to warmer
• warmer to cooler
• cooler to cooler

Tags

NGSS.HS-PS3-4

What does temperature measure?

• heat

• average kinetic energy

• space

• time

How much heat does an aluminum block absorb if 10.00 grams is heated from 25.0^oC to 50.0^oC? *Specific heat of aluminum is 0.900 J/g^oC

• 450 J

• -450 J

• 225 J

• -225 J

Tags

NGSS.HS-PS3-1

The specific heat of platinum is 0.133 J/g°C. How much heat is released when a 10 g piece of platinum cools from 100°C to 50°C?

• 66.5 J

• 665 J

• 0.0266 J

• 0.665 J

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4

Releasing heat into the surroundings occurs during an ___________________ reaction.

• Exothermic

• Endothermic

• Kinetic Energy

• Thermal Energy

Tags

NGSS.HS-PS1-4

How does energy flow?

• It goes from hot to cold

• It goes from cold to hot

• It transfers without any particular means

• It doesn't flow

Tags

NGSS.HS-PS3-4

Does the total energy change in a reaction?

• NEVER

• Yes, it increases

• Yes, it decreases

• Yes, but some increases and some decreases

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

A material was cooled from 100ºC to 40ºC.  What is the temperature change?

• 60ºC
• 40ºC
• -60ºC
• -40ºC