Author Question: Which of the following does not have a standard enthalpy of formation equal to zero at 25C and 1.0 atm? (Read 77 times)

segrsyd · **on:** Mar 21, 2021

Question 1

When 0.299 mol of a weak base (A^–) is reacted with excess HCl, 6.91 kJ of energy is released as heat. What is ΔH for this reaction per mole of A^– consumed?

◦ –43.3 kJ
◦ –75.3 kJ
◦ –23.1 kJ
◦ 43.3 kJ
◦ 23.1 kJ

Question 2

Which of the following does not have a standard enthalpy of formation equal to zero at 25°C and 1.0 atm?

◦ F₂(g)
◦ Al(s)
◦ H₂O(l)
◦ H₂(g)
◦ They all have a standard enthalpy equal to zero.

Ahnyah · **Reply #1 on:** Mar 21, 2021

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