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sin( 45degree+theeta)- cos(45degree-theeta)
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What will be the enthalpy of formation of HBr if hypothetical bond energy of H-H, Br-Br and H-Br are 300 kJ/mole, 100kJ/mole and 250kJ/mole respectively? Reaction is as under H, +Br2 = 2HBr-------- ( A) -50 kJ/mole C) -100 kJ/mole B) +50 kJ/mole D) +1000 kJ/mole

What will be the enthalpy of formation of HBr if hypothetical bond energy of H-H, Br-Br and H-Br are 300 kJ/mole, 100kJ/mole and 250kJ/mole respectively? Reaction is as under H, +Br2 = 2HBr-------- ( A) -50 kJ/mole C) -100 kJ/mole B) +50 kJ/mole D) +1000 kJ/mole

What will be the enthalpy of formation of HBr if hypothetical bond energy of H-H, Br-Br and H-Br are 300 kJ/mole, 100kJ/mole and 250kJ/mole respectively? Reaction is as under H, +Br2 = 2HBr-------- ( A) -50 kJ/mole C) -100 kJ/mole B) +50 kJ/mole D) +1000 kJ/mole