Enthalpy recap

Exo or endo? Energy is transferred from the chemical system to the surroundings...

• Exothermic

• Endothermic

Tags

NGSS.HS-PS1-4

Exo or endo? The surroundings gain energy

• Exothermic

• Endothermic

Exo or endo? The enthalpy of the chemical system increases

• Exothermic

• Endothermic

Exo or endo? The temperature of the surroundings decreases

• Exothermic

• Endothermic

What are standard conditions of pressure and temperature?

• 100 kPa, 298 K

• 1 atm, 298 K

• 100 Pa, 273 K

• 1 atm, 273 K

.......... ......... (two words) is the physical state of a substance under standard conditions

Standard enthalpy change of reaction, Δ_rH^Θ, is the enthalpy change that accompanies a reaction in the molar quantities shown in a chemical equation under standard conditions, with all reactants and products in their ........ ......... (two words)

Standard enthalpy change of formation, Δ_fH^Θ, is the enthalpy change that takes place when one mole of a compound is formed from its .................. under standard conditions (with all reactants and products in standard states).

Tags

NGSS.HS-PS1-4

What value in kJ mol^-1 is the standard enthalpy change of formation, Δ_fH^Θ, of any element?

Standard enthalpy change of combustion, Δ_cH^Θ, is the enthalpy change that takes place when ....... .......... (two words) of a substance reacts completely with oxygen under standard conditions (with all reactants and products in standard states).