1
Question
The standard enthalpy is zero for the substance
The standard enthalpy is zero for the substance
Open in App
Solution
The correct option is A C (graphite)
The Standard Enthalpy of formation is defined as the change in enthalpy when one mole of a substance in the standard state (1 atm of pressure and 298.15 K) is formed from its pure elements under the same conditions.
For carbon, we take the graphite to be most stable form. we calculate standard enthalpies of carbon compounds with reference to graphite. So standard enthalpy is zero for graphite. for others, it is non-zero.
The Standard Enthalpy of formation is defined as the change in enthalpy when one mole of a substance in the standard state (1 atm of pressure and 298.15 K) is formed from its pure elements under the same conditions.
For carbon, we take the graphite to be most stable form. we calculate standard enthalpies of carbon compounds with reference to graphite. So standard enthalpy is zero for graphite. for others, it is non-zero.
Suggest Corrections
0
Similar questions
View More
Join BYJU'S Learning Program
Explore more
Join BYJU'S Learning Program
