Thermochemistry

The graph above is from which type of reaction?

• Endothermic reaction

• Exothermic Reaction

Tags

NGSS.HS-PS1-4

The graph above is from which type of reaction?

• Endothermic reaction

• Exothermic reaction

Tags

NGSS.HS-PS1-4

ΔH value in an endothermic reaction is a positive number.

• True
• False

Tags

NGSS.HS-PS1-4

What type of reaction is shown in the reaction pathway?

• endothermic reaction
• exothermic reaction

Tags

NGSS.HS-PS1-4

How do you calculate Enthalpy of a reaction?

• ΔH = ΔH_products - ΔH_reactants

• ΔT = q / mC

• ΔG = ΔH -TΔS

• E = mc²

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

Enthalpy

• heat content of a system, at a constant pressure
• reaction that gives heat to the surroundings
• part of the Universe that is being studied
• temperature of the system

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

Endothermic Reaction

• reaction that takes heat from the surroundings

• reaction that gives heat to the surroundings

• reaction at constant pressure

• reaction at a constat speed

Exothermic Reaction

• reaction that gives heat to the surroundings

• reaction that takes heat from the surroundings

• reaction at constant pressure

• reaction at a constat speed

Tags

NGSS.HS-PS1-4

ΔH_rxn

• symbol for enthalpy of reaction

• symbol for enthalpy

• exothermic reaction

• difference in altitude

Tags

NGSS.HS-PS1-4