Thermochemical Reactions

What type of reaction is this?

• Exothermic

• Endothermic

• Energy Producing

• No way to tell

Tags

NGSS.HS-PS1-4

Is the reaction exothermic or endothermic

MgO + CaS ----> CaO + MgS + 200 KJ

• Exothermic

• Endothermic

Answer explanation

this is exothermic because energy is on the products side. It is released during the reaction.

Tags

NGSS.HS-PS1-4

If the enthalpy ter (ΔH) is negative the reaction is ____.

• Endothermic

• Exothermic

• Neutral

Tags

NGSS.HS-PS1-4

In an exothermic reaction, heat is ...

• taken in

• given out

Tags

NGSS.HS-PS1-4

In an endothermic reaction, heat is ...

• taken in

• given out

Tags

NGSS.HS-PS1-4

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

• Stay the same

• Increase

• Decrease

Tags

NGSS.HS-PS1-4

ΔH value in an endothermic reaction is a positive number.

• True

• False

Tags

NGSS.HS-PS1-4

Define 'Enthalpy'

• a) Energy stored in the movement of molecules in a substance

• b) The opposite of temperature

• c) The temperature of a molecule

• d) Energy stored in the chemical bonds in a substance

Tags

NGSS.HS-PS1-4

What kind of equation is this: 2KI + MgCl₂ + 200KJ ----> 2KCl + MgI₂

• Endothermic

• Exothermic

Tags

NGSS.HS-PS1-4

The temperature increases outside of this reaction

• exothermic

• endothermic

• both

• none

Tags

NGSS.HS-PS1-4