Standard Enthalpy Change

Which equation describes the standard enthalpy change of atomisation?

• ¹⁄₂H_{2 (g)} → H_(g)

• Na₂S₂O_{3 (s)} + 5H₂O → Na₂S₂O₃.5H₂O (s)

• HCl _(aq) + NaOH _(aq) → NaCl_(aq) + H2O_(l)

Which equation describes standard enthalpy change of combustion?

• NaOH (s) + aq → NaOH (aq)

• 2Fe (s) + 1¹/₂O_{2 (g)} → Fe₂O₃

• S_(s) + O_2(g) → SO₂

What is the standard enthalpy change of formation?

• 2Fe (s) + 1¹/₂O_2(g) → Fe₂O_3(s)

• 4Fe (s) + 3O₂ → 2 Fe₂O_3(s)

• 2H_2(g) + O_{2 (g)} → 2H₂O (l)

Tags

NGSS.HS-PS1-4

What is the standard enthalpy change of hydration?

• NaOH_(s) + aq → NaOH_(l)

• Na₂S₂O_{3 (s)} + 5H₂O_(l) → Na₂S₂O_3.5H₂O_(s)

• S(s) + O_2(g) → SO_2(g)

Which equation show the standard enthalpy change of solution?

• HCl(aq) + NaOH (aq) → NaCl(aq) + H₂O (l)

• Na₂S₂O₃(s) + 5H₂O(l) →Na₂S₂O_3.H₂O(s)

• NaOH(s) + aq → NaOH (aq)

Which equation shows the standard enthalpy change of neutralisation?

• CH_4(g) + 2O_{2 (g)} → CO₂ (g) + 2H₂O (l)

• HCl(aq) + NaOH (aq) → NaCl(aq) + H₂O (l)

• NaOH(s) + aq → NaOH (aq)