Enthalpy of Formation

SL: The standard enthalpy of formation

(ΔH_f) of gaseous O₂ is zero.

• True

• False

• $-2523kJ\ mol^{-1}$

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-4

• T > 1,114K

• T > 298K

• T > 854K

• At all temperatures

Tags

NGSS.HS-PS1-4

NGSS.HS-PS1-5

The change in enthalpy that accompanies making a compound from its elements

• Heat of reaction

• Heat of formation

• Hess's Law of heat summation

• Heat of fusion

• Heat of solution

Tags

NGSS.HS-PS1-4

Heat content of a system

• Calorimeter

• Calorie

• Joule

• Enthalpy

• Specific heat

Tags

NGSS.HS-PS3-4

----------------------------------------- of a compound is the change of enthalpy during the formation of 1 mole of the substance from its constituent elements, with all substances in their standard states.

• Heat of combustion

• Heat of formation

• Standard Heat of formation

• Standard heat of reaction

The enthalpy of formation of O₂ in its standard state is ------

• +0.1 kJ mol^-1

• 0

• -0.1 kJ mol^-1

• +16 KJ mol^-1

Tags

NGSS.HS-PS1-4

The standard enthalpy of formation (ΔH_f) of gaseous N_2 is zero.

• True

• False

Which of the following is defined as the enthalpy change when one mole of a compound is formed from its elements in their standard states?

• Heat of reaction

• Heat of formation

• Heat of vaporization

• Heat of combustion

The enthalpy of formation of carbon dioxide (CO_2) is measured under standard conditions. What does this imply about the state of carbon and oxygen?

• Carbon is in the form of diamond, and oxygen is in the form of ozone.

• Carbon is in the form of graphite, and oxygen is in the form of O_2 gas.

• Carbon is in the form of amorphous carbon, and oxygen is in the form of liquid.

• Carbon is in the form of graphite, and oxygen is in the form of liquid.