The Nature of Matter, Enthalpy, and Calorimetry

If enthalpy(ΔH) is on the reactants side of a chemical reaction, then the reaction is _________.

• Endothermic

• Exothermic

If enthalpy(ΔH) is on the products side of a chemical reaction, then the reaction is _________.

• Endothermic

• Exothermic

If an enthalpy (ΔH) value is given outside of a chemical equation and it is a positive value, then the reaction is _______________.

• Endothermic

• Exothermic

Tags

NGSS.HS-PS1-4

If an enthalpy (ΔH) value is given outside of a chemical equation and it is a negative value, then the reaction is _______________.

• Endothermic

• Exothermic

What kind of reaction is this?

• Endothermic
• Exothermic
• Cannot be determined

Tags

NGSS.HS-PS1-4

What kind of reaction is shown in graph A on the left?

• Endothermic

• Exothermic

• Cannot be determined

Tags

NGSS.HS-PS1-4

You mix two solutions and the beaker starts to feel warm.

• endo

• exo

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

You mix two solids and they get so cold they freeze a drop of water on the lab counter.

• endo

• exo

Tags

NGSS.HS-PS3-4

What would be the effect on the particles if more heat is supplied to the system?

• They would slow down
• They would stop moving
• They would speed up
• There would be no effect

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-4

Thermal energy ALWAYS moves from _____ to _____.

• solid to liquid
• ice to water
• hot to cold
• solid to gas

Tags

NGSS.HS-PS3-4