Thermochemistry Definitions

In an exothermic reaction, the surroundings lose heat.

• True

• False

Tags

NGSS.HS-PS1-4

The source of the heat flow is called the

• System

• Surroundings

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-4

H₂ + Cl₂ → 2 HCl + 1845 kJ

Is this reaction endothermic or exothermic?

• Endothermic

• Exothermic

Tags

NGSS.HS-PS1-4

In an endothermic reaction, do the reactants have a higher or lower energy than the products?

• Higher

• Lower

Tags

NGSS.HS-PS1-4

Which graph represents an endothermic reaction?

• A

• B

Tags

NGSS.HS-PS1-4

H₂ + 2C + N₂ + 270.3 kJ → 2HCN

Is this reaction endothermic or exothermic?

• Endothermic

• Exothermic

Tags

NGSS.HS-PS1-4

Anything around the system, but not the system itself is called the

• Reaction

• Surroundings

• Calorimetry

• Thermochemistry

In an endothermic reaction, the system releases energy.

• True

• False

Tags

NGSS.HS-PS1-4

The minimum amount of energy required to start a chemical reaction is called the

• Kinetic energy

• Activation energy

• Potential energy

• Heat energy

Tags

NGSS.HS-PS1-4

__________ reactions absorb energy, while __________ reactions release energy.

• Exothermic, endothermic

• Endothermic, exothermic

Tags

NGSS.HS-PS1-4