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	<title>Professores Online &#187; Gabsdantas</title>
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		<title>Exercício sobre a Lei de Hess, química</title>
		<link>http://www.professoronline.net/exercicio-sobre-a-lei-de-hess-quimica/</link>
		<comments>http://www.professoronline.net/exercicio-sobre-a-lei-de-hess-quimica/#comments</comments>
		<pubDate>Mon, 03 Nov 2014 18:35:57 +0000</pubDate>
		<dc:creator><![CDATA[Gabsdantas]]></dc:creator>
				<category><![CDATA[Química]]></category>
		<category><![CDATA[a]]></category>
		<category><![CDATA[de]]></category>
		<category><![CDATA[exercicio]]></category>
		<category><![CDATA[hess]]></category>
		<category><![CDATA[lei]]></category>
		<category><![CDATA[quimica]]></category>
		<category><![CDATA[sobre]]></category>

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		<description><![CDATA[[QUÍMICA] alguém por favor pode me ajudar com esse exercício (Lei de Hess) ? I. B2H6(g) + 3O2(g) &#8212;&#8212;&#8211;&#62; B2O3(s) + 3H2O(g) dH= 1900KJ . mol^-1 II. B(s) + 3/4 O2 (g) &#8212;&#8212;&#8212;&#62; 1/2 B2O3(s) dH= -1200KJ . mol^-1 III. H2(g) + 1/2 O2(g)&#8212;&#8212;&#8211;&#62; H2O(g) dH= -240KJ . mol^-1 Determine o calor de formação (dH) [&#8230;]]]></description>
				<content:encoded><![CDATA[<p>[QUÍMICA] alguém por favor pode me ajudar com esse exercício (Lei de Hess) ?<br />
I. B2H6(g) + 3O2(g) &#8212;&#8212;&#8211;&gt; B2O3(s) + 3H2O(g) dH= 1900KJ . mol^-1<br />
II. B(s) + 3/4 O2 (g) &#8212;&#8212;&#8212;&gt; 1/2 B2O3(s) dH= -1200KJ . mol^-1<br />
III. H2(g) + 1/2 O2(g)&#8212;&#8212;&#8211;&gt; H2O(g) dH= -240KJ . mol^-1<br />
Determine o calor de formação (dH) do diborano na reação 2B(s) + 3H2(g) &#8212;&#8211;&gt; B2H6(g) .<br />
CurtirCurtir · </p>
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