Energy and Chemical Change

If 980. J of energy is added to 6.20 g of water at 18.0 °C, what is the final temperature of the water? (The specific heat of water is 4.18 J/g°C.)

• 37.8 °C

• -19.8 °C

• 19.8 °C

• 55.8 °C

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4

Which of the following is true in an endothermic reaction?

• heat is released; bond forming process

• heat is absorbed; bond breaking process

• heat is released; bond breaking process

• heat is absorbed; bond forming process

Tags

NGSS.HS-PS1-4

Breaking chemical bonds takes in energy from the surroundings. This is an example of?

• endothermic

• making

• exothermic

• breaking

Tags

NGSS.HS-PS1-4

Making chemical bonds gives out energy to the surroundings. This is an example of?

• endothermic

• exothermic

• energy level diagram

• combustion

Tags

NGSS.HS-PS1-4

In exothermic reaction the heat is

• taken in

• given out

In endothermic reaction the heat is

• given out

• taken in

Tags

NGSS.HS-PS1-4

If the reaction is EXOTHERMIC, what will happen to the temperature?

• no change

• increase

• decrease

Tags

NGSS.HS-PS1-4

If the reaction is ENDOTHERMIC, then what will happen to the temperature?

• decrease

• increase

• stays the same

Cooking an egg is example of?

• endothermic reaction

• exothermic reaction

• covalent bond

• none of these

Tags

NGSS.HS-PS1-4

NGSS.HS-PS1-5

The products of combustion are

• CO2 and H2O

• CO2

• O2 and H2O

• O2

Tags

NGSS.MS-PS1-5