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6. Given the following thermochemical equations: 2 Naci+H,0 - 2 HCI + Na, AH = + 507 kJ (Equation 1) NO + NO + Na,

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6. Given the following thermochemical equations: 2 Naci+H,0 - 2 HCI + Na, AH = + 507 kJ (Equation 1) NO + NO + Na, 0 - 2 NaNO, AH = - 427 kJ (Equation 2) NO+NO, - N0+ 0 AH = -43 kl (Equation 3) 2 HNO - NO + ,+HO AH = + 34 kJ (Equation 4) Using Hess's Law calculate the AHo for the reaction: HCl + NaNO - HNO, + NaCl AH' => a. 35 kJ b. -157 kJ c. 42 kJ d. -78 kJ

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