Butane gas, C4H10, is sold to campers as bottled fuel. Its density at 258C and 1.00 atm is 2.38 g/L. What volume of butane gas at 258C and 1.00 atm is required to heat one gallon of water (d 5 1.00 g/mL) from 258C to 988C? The reaction for the combustion of butane (DHf 8 5 2125.6 kJ/mol) is C H (g)113O (g)9:4CO (g)15H O(g)

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Asked Nov 13, 2019
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Butane gas, C4H10, is sold to campers as bottled fuel. Its density at 258C and 1.00 atm is 2.38 g/L. What volume of butane gas at 258C and 1.00 atm is required to heat one gallon of water (d 5 1.00 g/mL) from 258C to 988C? The reaction for the combustion of butane (DHf 8 5 2125.6 kJ/mol) is C H (g)113O (g)9:4CO (g)15H O(g)

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Expert Answer

Step 1

The standard enthalpy change for a reaction can be calculated as shown below.

AH-,AH (products)-AH (reactants)
Where, nand n, are the number of molesof products andreactantsrespectively
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AH-,AH (products)-AH (reactants) Where, nand n, are the number of molesof products andreactantsrespectively

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Step 2

The balanced chemical reaction is,

13
(8)> 4CO, (8)+ 5H,0(g)
C,H1(g)
2
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13 (8)> 4CO, (8)+ 5H,0(g) C,H1(g) 2

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Step 3

The change in enthalpy for the above reacti...

AH-nAH2(prođucts)-nAH2 (reactants)
[4x (-393.5kJ/mol) +5x (-241.8kJ /mol)
-[1x(-125.6kJ/mol)+ 13/2x (0kJ/mol)]
= -2657.4kJ/mol
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AH-nAH2(prođucts)-nAH2 (reactants) [4x (-393.5kJ/mol) +5x (-241.8kJ /mol) -[1x(-125.6kJ/mol)+ 13/2x (0kJ/mol)] = -2657.4kJ/mol

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