BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

Solutions

Chapter
Section
BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

You wish to know the enthalpy change for the formation of liquid PCl3 from the elements.

P4(s) + 6 Cl2(g) → 4 PCl3() Δr = ?

The enthalpy change for the formation of PC15 from the elements can be determined experimentally, as can the enthalpy change for the reaction of PCl3 () with more chlorine to give PCl5(s):

P4(s) + 10 Cl2(g) → 4 PCl5(s)

ΔrH° = –1774.0 kJ/mol-rxn

PCl3() + Cl2(g) → PC15(s)

ΔrH° = –123.8 kJ/mol-rxn

Use these data to calculate the enthalpy change for the formation of 1.00 mol of PCl3() from phosphorus and chlorine.

Interpretation Introduction

Interpretation:

The enthalpy change for the formation of 1mole of PCl3 has to be determined.

Concept Introduction:

If a reaction proceeds in two or more other reaction,ΔrH0 for the overall process is the sum of ΔrH0 values of those reactions-Hess’s law.

Explanation

The required equation for the formation of PCl3 is found out by multiplying the 2nd equation by 4

  4PCl3+4Cl24PCl5

 And then by subtracting the 2nd equation from the 1st equation, so we get,

  P4+6Cl24PCl3

  ΔrH20=4×-123.8kJ/mol =-495

Still sussing out bartleby?

Check out a sample textbook solution.

See a sample solution

The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started

Additional Science Solutions

Find more solutions based on key concepts

Show solutions add

No animal cell has a ___________. a. plasma membrane b. flagellum c. lysosome d. cell wall

Biology: The Unity and Diversity of Life (MindTap Course List)

When blood glucose concentration rises, the pancreas secretes, and when blood glucose levels fall, the pancreas...

Nutrition: Concepts and Controversies - Standalone book (MindTap Course List)

How many autosomes are present in a body cell of a human being? In a gamete?

Human Heredity: Principles and Issues (MindTap Course List)

Four parallel metal plates P1, P2, P3, and P4, each of area 7.50 cm2, are separated successively by a distance ...

Physics for Scientists and Engineers, Technology Update (No access codes included)