(A) The standard enthalpy of formation for the amino acid leucine, C₆H₁₃O₂N(s), is -637.3 kJ/mol. Write the chemical equation to which this value applies.

(B) How is Δ_rH° for the following reaction related to the standard enthalpy of formation of NH₃(g) listed in Table 7.2? What is the value of Δ_rH° = ?

Table 7.2

Transcribed Image Text:

2 NH3(g) N2(g) + 3 H2(g) A,H° = ?