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The amount of heat released when 20 ml 0...

The amount of heat released when 20 ml 0.5 M NaOH is mixed with 100 ml 0.1 M HCl is x kJ .The heat of neutralization is

A

`- 100 x kJ//mol`

B

` - 50 x kJ //mol`

C

` +100 x kJ // mol `

D

` + 50 x kJ//mol`

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