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Q.

When 1 litre of 1M HCl is mixed with 1 litre of 1M NaOH, the rise in temperature was found to be T1. In another experiment 1 litre of 0.5 M NaOH is mixed with 1 lit. of 0.5 M HCl. The rise in temperature was found to be T2. Then

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Detailed Solution

ΔH = msΔT   (s = specific heat)No.of eq of acid/Base = 1x1 = 1eqΔH1= -13.6=(1+1)ST1......(1)No.of eq of acid/base = 1x0.5=1/2eqΔH2=-13.6/2=(0.5+0.5)ST2......(2)Dividing eq (1) and (2)  T1=T2
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When 1 litre of 1M HCl is mixed with 1 litre of 1M NaOH, the rise in temperature was found to be T1. In another experiment 1 litre of 0.5 M NaOH is mixed with 1 lit. of 0.5 M HCl. The rise in temperature was found to be T2. Then