u uBder conditions of constani curs in acalonmeter and the temperature of the co

Question

u uBder conditions of constani curs in acalonmeter and the temperature of the contents of decalonneer decre when a reaction o the reaction must be exothermic. 9.(2 marks) Consider the following data: AapH 5.56 kJ/mol Specific heat capacity of N2 (g)-29.2J mol K Specific heat capacity of N () 56.04 J mor K Boiling point of N2 77.355 K What is the energy in the form of heat released when 450 g of nitrogm gas (molar mass 28.02 g/mol) at 23.0 °C is converted to liquid nitrogen at-200 A) 17.1 kJ B) 196 KJ C) 364 kJ D) 392 E) 113 04

Explanation / Answer

q released = n*s*DT + n*DT + n*s*DT

     = (450/28.02)*29.2*(296.15-77.355)+(450/28)*5.56*10^3+(450/28)*56.04*(77.355-73.15)

    = 196 kj

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