Question

When hydrogen gas is burnt in chlorine 2000cals of heat is liberated during the formation of 3.65g of HCl, delta H of formation of HCl is
1) 2 K.cal 2) -20 K.cal
3) 20 K.cal 4) -2 K.cal

The right answer is 2) -20 K.cal. But How?????

Answer 1

Answer:

20 k.cal

Explanation:

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