For which one of the following is ΔHfo zero?

A. O (g)

B. Na (s)

C. CO2 (s)

D. N2 (l)

Question

Chemistry

Finnegan Gallegos

30 October, 06:39

For which one of the following is ΔHfo zero?

A. O (g)

B. Na (s)

C. CO2 (s)

D. N2 (l)

+3

Answers (2)

Know the Answer?

Carlos Nash · Answer 1

The standard enthalpy of formation is zero for B and D since by definition, the standard enthalpy of formation for an element at its standard state is zero. The monatomic oxygen is not the standard state of oxygen while carbon dioxide is already a molecule.

Jeremy Reyes · Answer 2

Jeremy Reyes 30 October, 10:22

0

The answer is most likely C

For which one of the following is ΔHfo zero?A. O (g)B. Na (s)C. CO2 (s)D. N2 (l)

For which one of the following is ΔHfo zero?

A. O (g)

B. Na (s)

C. CO2 (s)

D. N2 (l)