Sections | |||
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Internal Energy | 22 mins | 0 completed | Learn |

Calorimetry | 39 mins | 0 completed | Learn |

Hess's Law | 17 mins | 0 completed | Learn |

Enthalpy of Formation | 13 mins | 0 completed | Learn Summary |

End of Chapter 6 Problems | 52 mins | 0 completed | Learn |

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Units of Energy |

Endothermic & Exothermic Reactions |

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Enthalpy |

Solution: Use the standard reaction enthalpies given below to determine ΔH°rxn for the following reaction:
P4(g) + 10Cl2(g) → 4PCl5(s) ΔH°rxn = ?
Given
PCl5(s) → PCl3(g) + Cl2(g) ΔH°rxn = +157kJ
P4(g) + 6Cl2(g) → 4PCl3(g) ΔH°rxn = -1207kJ
A) -1835 kJ
B) - 1364 kJ
C) -1050 kJ
D) -1786kJ
E) -2100 kJ

Use the standard reaction enthalpies given below to determine ΔH°_{rxn} for the following reaction:

P_{4}(g) + 10Cl_{2}(g) → 4PCl_{5}(s) ΔH°_{rxn }= ?

Given

PCl_{5}(s) → PCl_{3}(g) + Cl_{2}(g) ΔH°_{rxn }= +157kJ

P_{4}(g) + 6Cl_{2}(g) → 4PCl_{3}(g) ΔH°_{rxn }= -1207kJ

A) -1835 kJ

B) - 1364 kJ

C) -1050 kJ

D) -1786kJ

E) -2100 kJ

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