When equal volume of 1 M HCl and 1 M are separately neutralised by excess volume of 1 M NaOH solution, and kJ of heat is liberated respectively. The value of is .

Question

When equal volume of 1 M HCl and 1 M  are separately neutralised by excess volume of 1 M NaOH solution,  and  kJ of heat is liberated respectively. The value of  is .

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Strategy:
 Neutralization heat depends on the number of moles of  reacting with . Calculate the moles of  provided by the equal volumes of each acid.

Step 1: Moles of  from HCl
For , moles of .
Heat liberated () is proportional to .

Step 2: Moles of  from 
For , each mole of acid provides  moles of .
Moles of .
Heat liberated () is proportional to .

Step 3: Calculate the ratio
.

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