Monday
December 22, 2014

Homework Help: Chemistry

Posted by Zacky on Wednesday, May 12, 2010 at 5:48am.

(1) Why are fractional coefficients permitted in a balanced thermochemical equation?


In thermochemical reactions, only small amounts of matter are considered.

If fractional coefficients were not used, the scale of the reaction would be excessively large.

Fractional coefficients are permitted because the enthalpy change for the reaction is dependent on the amount of matter present.

Fractional coefficients are permitted in order to have the smallest possible set of coefficients for a given reaction.

Fractional coefficients are permitted because the enthalpy change for the reaction is independent of the amount of matter present.


If a thermochemical equation has a coefficient of 1/2 for a formula, it signifies that----?-------.

(2) A body of water with a mass of 732 g changed in temperature from 24.62 to 19.47 C (Its specific heat is 4.184 Jg-1K-1).

What would have to be done to cause such a change ? ------?---

How much energy (in kilojoules) is involved in this change?
----?-----kJ

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

chemistry - When the following combustion reaction is balanced using the ...
chemistry - How many of the following are true concerning balanced chemical ...
Chemistry - BrO3^-(aq)+Sn^2+(aq)+ ____ -->Br^-(aq)+Sn^4+(aq)+ _____ H20(l)and...
chemistry - How do you calculate deltaHf using the # of moles from a balanced ...
Chemistry - Write a balanced chemical equation that represents the self-...
chem - Write balanced equations for the following reactions. (Use the lowest ...
Chemisty - When the following molecular equation is balanced using the smallest ...
Algebra 2 - i need help, step by step, in solving for fractional coefficients. ...
Chemistry - Write the balanced chemical equation for each of the following. (Use...
Chemistry - Write the balanced chemical equation for each of the following. (Use...

Search
Members