Are my answers to these Chemistry problems correct?

Question

In the equation ΔH^o = Σ ΔH_f^o (products) – Σ ΔH_f^o (reactants), ΔH^o stands for _______.

A. standard change of enthalpy

B. standard change of entropy

C. change in heat

D. change in hydrogen bonds

E. None of the Above

The equation ΔH^o = Σ ΔH_f^o (products) – Σ ΔH_f^o (reactants) stands for _______.

A. the First Law of Thermodynamics

B. the Second Law of Thermodynamics

C. the Third Law of Thermodynamics

D. Hess’s Law

E. Gibbs Free Energy Law

What is the ΔH^o of the equation 4NH₃ (g) + 5O₂ (g) → 4NO (g) + 6H₂O (g)? Given: ΔH_f^o NH₃ = –45.9 kJ/mol, ΔH_f^o NO = 90.3 kJ/mol, ΔH_f^o H₂O = –242 kJ/mol.

A. ΔHo = 90.7 kJ

B. ΔHo = –90.7 kJ

C. ΔHo = 907 kJ

D. ΔHo = –907 kJ

E. None of the Above

Answer 1

Are my answers to these Chemistry problems correct?

Hello Jesse,

The answers look correct to me.