The heat of neutralization of a strong base and a strong acid is 57 kJ. The heat released, when 0.5 mole of $H N O_{3}$ solution is added to 0.20 moles of NaOH solution, is:

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If 0.5 mole of sodium reacts completely with chlorine then how much heat is released by the following reaction?2Na(s)+Cl2(g)→2NaCl(s)+822kJ ?

The correct option is A 205 kJIf 2 moles of sodium reacts completely with chlorine then 822 kJ heat is released.If 0.5 moles of sodium reacts completely with chlorine then 0.5×8222=205kJ heat is released.

If $0.5$ mole of sodium reacts completely with chlorine then how much heat is released by the following reaction?
$2 N a (s) + C l_{2} (g) \to 2 N a C l (s) + 822 k J$ ?

The correct option is A $205$ kJ
If 2 moles of sodium reacts completely with chlorine then 822 kJ heat is released.
If 0.5 moles of sodium reacts completely with chlorine then $\frac{0.5 \times 822}{2} = 205 k J$ heat is released.