chapter 6 Tutorial Questions done

chapter 6 Tutorial Questions done - 2(g CF 4(g H =-680 kJ...

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Chapter 6 Tutorial Question 1.(a) How many joules are required to heat 100 g of iron ( C = 0.45 J/gK) from 10° C to 100° C? (b) The same quantity of heat as in (a) is added to 100 g of aluminum ( C = 0.91 J/gK) at 10° C. What is the final temperature? 1.Exactly three grams of carbon were burned to CO 2 in a copper calorimeter. The mass of the calorimeter is 1500 g, and the mass of water in the calorimeter is 2000 g. The initial temperature was 20.0 o C and the final temperature 31.3 o C. Calculate the heat of combustion of carbon in joules per gram. Specific heat capacity of copper is 0.389 J/gK.

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3. From the enthalpies of reaction H 2 (g) + F 2 (g) 2HF(g) H = -537 kJ C(s) + 2F
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Unformatted text preview: 2 (g) CF 4 (g) H = -680 kJ ∆ 2C(s) + 2H 2 (g) C 2 H 4 (g) H = +52.3 kJ ∆ Calculate H for the reaction of ethylene with F ∆ 2 : C 2 H 4 (g) + 6F 2 (g) 2CF 4 (g) + 4HF(g) 4. Calculate the standard enthalpy change for the following reaction: SO 2 (g) + 2H 2 S(g) 3/8S 8 (s) + 2H 2 O(g) ∆ H o f (kJmol-1 ) -296.9 -20.17 +102.3 -241.82 5. Calculate the standard enthalpy of formation of gaseous diborane (B 2 H 6 ) using the following thermochemical information: 4B(s) + 3O 2 (g) 2B 2 O 3 (s) H ∆ o =-2509.1kJ 2H 2 (g) + O 2 (g) 2H 2 O(l) H ∆ o =-571.7kJ B 2 H 6 (g) + 3O 2 (g) B 2 O 3 (s) + 3H 2 O(l) H ∆ o =-2147.5kJ...
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chapter 6 Tutorial Questions done - 2(g CF 4(g H =-680 kJ...

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