Enthalpy

Find the enthalpy of formation for the following chemical equation.

CH₄ (g) + 2 O₂ (g) --> CO₂ (g) + 2 H₂O (g)

• -802.3 kJ

• 802.3 kJ

• 951.9 kJ

• -951.9 kJ

Tags

NGSS.HS-PS1-4

Find the enthalpy of formation for the following chemical reaction.

2Al (s) + Fe₂O₃ (s) --> Al₂O₃ (s) + 2Fe (s)

• -847.6 kJ

• 847.6 kJ

• 2492 kJ

• -2492 kJ

Tags

NGSS.HS-PS1-4

Find the enthalpy change that occurs over the following two-step equations.

2 H₂ (g) + O₂ (g) --> 2 H₂O (l) ΔH = -572 kJ

2 H2O2 (l) --> 2 H2 (g) + 2 O2 (g) ΔH = 376 kJ

• -196 kJ

• -948 kJ

• 196 kJ

• 948 kJ

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

Find the change in enthalpy over the following two-step equations.

N₂ (g) + O₂ (g) --> 2 NO (g) ΔH = 180kJ

2 NO (g) + O₂ (g) --> 2 NO₂ ΔH = -112kJ

• -292 kJ

• -68 kJ

• 292 kJ

• 68 kJ

Tags

NGSS.HS-PS1-4

How much energy would it take to condense 4.9 moles of C₂H₅OH?

• 189.14 kJ

• -189.14 kJ

• 24.206 kJ

• -24.206 kJ

Tags

NGSS.HS-PS3-1

How much energy is required to turn 7.3 moles of NH₃ from a solid to a liquid?

• -170.09 kJ

• -41.32 kJ

• 41.32 kJ

• 170.09 kJ