Thermodynamic

What is the sign of ΔH for all endothermic reactions?

• Positive

• Negative

Tags

NGSS.HS-PS1-4

What is the PE of the products?

• 100 kJ

• 175 kJ

• 50 kJ

• 75 kJ

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

What type of reaction is this?

• Endothermic

• Exothermic

Tags

NGSS.HS-PS1-4

How many Joules of energy are required to change 10 gram of water from 20 C to 90 C?

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4

How many Joules of energy are required to change 10 gram of ice at -2 C to water at 20 C?

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4

Exothermic reactions feel...

• Hot

• Cold

Tags

NGSS.HS-PS1-4

The energy absorbed by endothermic reactions is used to...

• form chemical bonds between atoms that release a lot of energy when they're formed

• break chemical bonds that require a lot of energy to break

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

The energy released by exothermic reactions happens when...

• chemical bonds that release a lot of energy when they're formed are formed between atoms

• chemical bonds that require a lot of energy to break are broken

Tags

NGSS.HS-PS1-4

If a chemical reaction is EXOTHERMIC, the temperature of the surrounding would....

• Stay the same

• Increase

• Decrease

Tags

NGSS.HS-PS1-4

Endothermic reactions feel...

• Hot

• Cold

Tags

NGSS.HS-PS1-4