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কোন বিক্রিয়ায় এনথালাপির পরিবর্তন সর্বনিম্ন?

C H_{2} C O O H (a q) + N a O H (a q) \to C H_{3} C O O N a (a q) + H_{2} O (l)

C H_{3} C O O H (a q) + N H_{4} O H (a q) \to N H_{4} C l (a q) + H_{2} O (l)

H C l (a q) + N H_{4} O H (a q) \to N H_{4} (a q) + H_{2} O (I)

H C l (a q) + N a O H (a q) \to N a C l (a q) + H_{2} O (1)

ANS : 3

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