Purchase Solution

Standard Enthalpy of Reaction Question

Not what you're looking for?

Ask Custom Question

A 2.50-g sample of powdered zinc is added to 100.0 mL of a 2.00-M aqueous solution of hydrobromic acid in a calorimeter with a total heat capacity of 448 J/K. The observed increase in temperature is 21.1 K at a constant pressure of one bar. Using these data, calculate the standard enthalpy of reaction.

Attachments
Purchase this Solution
Solution Summary

How do you calculate the standard enthalpy of a reaction from data taken from an experiment? All of the math necessary to solve this problem is given.

Solution Preview

SOLUTION:
First, find the q from this reaction to arrive at internal energy, deltaU
q=448J/K * (-21.1K)
q=-9452.8J

Since the system is closed off, the volume is constant, so q is the ...

Purchase this Solution
Free BrainMass Quizzes
Thermochemistry

The quiz helps in revising basic concepts about thermochemistry.

Match Elements with their Symbols

Elements are provided: choose the matching one- or two-letter symbol for each element.

Functional groups in Organic Chemistry

You will be tested on the names of functional groups in Organic Chemistry. It is very important to know the functional groups to understand Organic reactions.

Organic Chemistry Naming: Alkanes

This is a quiz which is designed to assist students with learning the nomenclature used to identify organic compounds. This quiz focuses on the organic compounds called Alkanes.

General Chemistry - Classification of Matter

This test will assess your knowledge on the classification of matter which includes elements, compounds and mixtures.

View More Free Quizzes
Related BrainMass Solutions

  • Enthalpy Change of a Reaction

    Solution: The standard enthalpy change of a reaction is defined as: Therefore, the answer is: This Solution contains calculations to aid you in understanding the Solution to this question.

  • Calculate the Change in Enthalpy for the Reaction

    H 2 O(l)+CCl 4 (l)→COCl 2 (g)+2HCl(g) You can use the following table of standard heats of formation (ΔH ∘ f ) to calculate the enthalpy of the given reaction.

  • Contract or Expanding Gases

    The reaction in question is of decomposition of water. 2H2O (l) → 2H2 (g) + O2 (g), Note: 2 moles of water are participating in reaction as reactant.

  • Standard Enthalpy Change

    58307 Standard Enthalpy Change Calculate the standard enthalpy change of a reaction using the total enthalpies of the reactants and the products. The total enthalpy of the reactants is -912 kJ and the total enthalpy of the products is -82 kJ.

  • Working with Enthalpy

    5320 Working with enthalpy of formation. The reaction of 4.49 g of carbon and 9.21 g of oxygen, produced carbon dioxide, and 113.2 kJ of heat. What is the enthalpy of formation of carbon dioxide?

  • Calculate the heat combustion for the following reaction fro

    -285.8 kJ/mol Delta H of the reaction = {Sum[n X Standard Enthalpy of formation of Products] - Sum[n X Standard Enthalpy of Formation of Reactants] Heat of combustion for this reaction = 2*(-393.5-285.8) - 52.47 = -1411.07 (kJ/mol) Reference

  • Free radical reaction

    To calculate the heat of reaction, we take the sum of standard enthalpy of the products minus the sum of standard enthalpy of the reactants. Use any good chemistry reference text for these values at 298K.

  • Calculating the Standard Enthalpy of a Reaction

    503970 Calculating the Standard Enthalpy of a Reaction Using the standard enthalpies of formation, what is the standard enthalpy of the following reaction? CO(g)+ H2O(g)?

  • Gibbs free energy

    7135 Multiple choice question about the effect on Gibbs free energy from increasing the reactant or product pressure. In a gas phase reaction, what is the effect of increasing reactant or product pressure on the standard Gibbs free energy? a.

View More Related Solutions