Part A:
Write an equation for the formation of NO(g) from its elements in their standard states.
Express your answer as a chemical equation. Identify all of the phases in your answer.
Part B:
Write an equation for the formation of BF3(g) from its elements in their standard states.
Express your answer as a chemical equation. Identify all of the phases in your answer.
Part C:
Write an equation for the formation of C6H6(l) from its elements in their standard states.
Express your answer as a chemical equation. Identify all of the phases in your answer.
Part D:
Write an equation for the formation of HF(g) from its elements in their standard states.
Express your answer as a chemical equation. Identify all of the phases in your answer.
A)
Standard state of N is N2(g)
Standard state of O is O2(g)
So, the formation reaction is:
1/2 N2(g) + 1/2 O2(g) -> NO(g)
B)
Standard state of B is B(s)
Standard state of F is F2(g)
So, the formation reaction is:
B(s) + 3/2 F2(g) -> BF3(g)
C)
Standard state of C is C(s,graphite)
Standard state of H is H2(g)
So, the formation reaction is:
6 C(s,graphite) + 3 H2(g) -> C6H6(l)
D)
Standard state of H is H2(g)
Standard state of F is F2(g)
So, the formation reaction is:
1/2 H2(g) + 1/2 F2(g) -> HF(g)
Part A: Write an equation for the formation of NO(g) from its elements in their standard...
Part A: Determine ΔH∘f for NO(g) Part B: Determine ΔH∘f for BF3(g) Part C: Determine ΔH∘f for C6H6(l) Part D: Determine ΔH∘f for HF(g) 0 Standard Enthalpies of Formation at 25°C Substance AH; (kJ/mol) B(s) B2O3(s) – 1273.5 BF3(g) -1136.0 C(s, graphite) C(s, diamond) 1.88 C2H2(g) 227.4 C6H6(1) 49.1 HF(9) –273.3 F(g) 79.38 472.7 0 91.3 249.2 N(g) N2(g) NO(g) O(g) O2(g) 03 (9) H(9) H2(g) 142.7 218.0 O
A Review | Constants IF Part A Enter an equation for the formation of BF3(g) from its elements in their standard states. Express your answer as a chemical equation. Identify all of the phases in your answer. Submit Request Answer
For each of the following compounds, write a balanced thermochemical equation depicting the formation of one mole of the compound from its elements in their standard states and use Appendix C in the textbook to obtain the value of ΔH∘f. Part G For NH4NO3(s) write a balanced thermochemical equation. Express your answer as a chemical equation. Identify all of the phases in your answer. Part H For NH4NO3(s) find the value of ΔH∘f. Express your answer using four significant figures.
Part B Find AH; for BF3 (g) from the given table. Substance AH kJ/mol 565.0 o 79.38 B(g) B(s) F(g) F2(g) BF3(8) BC1: (g) B,H6(8) B2O3(g) - 1136.0 -403.8 36.4 - 1273.5 Express your answer using one decimal place. IVO AQ – Oo ? AH; - kJ/mol Submit Request Answer
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