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<blockquote data-quote="bob1" data-source="post: 2742038" data-attributes="member: 207591">hi im confused i haved try these problems 2 times and got the wrong can u guys give me explanitantions for these problems pls so in the future i can do them tyWhen heat flows from the system to the surroundings&nbsp;Student ResponseValueFeedbackA.we define the flow of energy as negative and call it EXOTHERMIC &nbsp;B.we define the flow of energy as positive and call it EXOTHERMICC.we define the flow of energy as negative and call it ENDOTHERMIC D.we define the flow of energy as positive and call it ENDOTHERMIC Which of the following is true about the properties of DH?&nbsp;Student ResponseValueFeedback&nbsp;A.if a reaction is reversed, the sign of DH remains the sameB.DH is the same for any amount of reactants. C.DH is directly proportional to the amount of reactants. If DH for the reaction A + 2B -&gt; C is +30 kJ/molWhat is DH for the reaction C -&gt; A + 2B?&nbsp;Student ResponseValueFeedbackA.+60 kJ/mol &nbsp;B.-60 kJ/mol C.+30 kJ/mol D.-30 kJ/mol E.we do not have enough information to determine this. If DH for the reaction A + 2B -&gt; C is +30 kJ/molWhat is DH for the reaction if you have ½ mol A and 1 mol B?&nbsp;Student ResponseValueFeedbackA.+15 kJ/mol &nbsp;B.+30 kJ/mol&nbsp; C.-30 kJ/mol D.-15 kJ/mol E.we do not have enough information to determine this.</blockquote>

[QUOTE="bob1, post: 2742038, member: 207591"] hi im confused i haved try these problems 2 times and got the wrong can u guys give me explanitantions for these problems pls so in the future i can do them ty When heat flows from the system to the surroundings Student ResponseValueFeedback A.we define the flow of energy as negative and call it EXOTHERMIC B.we define the flow of energy as positive and call it EXOTHERMIC C.we define the flow of energy as negative and call it ENDOTHERMIC D.we define the flow of energy as positive and call it ENDOTHERMIC Which of the following is true about the properties of DH? Student ResponseValueFeedback A.if a reaction is reversed, the sign of DH remains the same B.DH is the same for any amount of reactants. C.DH is directly proportional to the amount of reactants. If DH for the reaction A + 2B -> C is +30 kJ/mol What is DH for the reaction C -> A + 2B? Student ResponseValueFeedback A.+60 kJ/mol B.-60 kJ/mol C.+30 kJ/mol D.-30 kJ/mol E.we do not have enough information to determine this. If DH for the reaction A + 2B -> C is +30 kJ/mol What is DH for the reaction if you have ½ mol A and 1 mol B? Student ResponseValueFeedback A.+15 kJ/mol B.+30 kJ/mol C.-30 kJ/mol D.-15 kJ/mol E.we do not have enough information to determine this. [/QUOTE]

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