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For the transition C("(diamond)") rarr C...

For the transition `C_("(diamond)") rarr C_("(graphite)"), DeltaH=-1.5 kJ`. It follows that

A

Graphite is stable than diamond

B

Diamond is stable than graphite

C

Graphite is endothermic substance

D

Diamond is exothermic substance

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The correct Answer is:
A
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For the change C (diamond) rarr C(graphite) , Delta H=-1.89 KJ, if 6 g of diamond and 6g of graphite are seperately burnt to yield CO_(2) the heat liberated in first case is :

Two reactions are given below : C_("(graphite)")+O_(2(g))rarrCO_(2(g)),DeltaH=-393.7kJ C_("(diamond)")rarrC_("(graphite)"),DeltaH=-2.1kJ What quantity of diamond will give 800 kJ of heat on burning ?

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