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Chapter 5: Q45E (page 227)

How much heat is produced by burning 4.00 moles of acetylene under standard conditions?

Short Answer

Expert verified

The heat produced by burning 4 mol of acetylene under standard conditions is 5204.4 kJ.

Step by step solution

01

Reaction of acetylene with oxygen

Note that the enthalpy of combustion ofacetylene (鈭咹) = -1301.1 kJ/mol.

The equation representing the burning of 1mol of acetylene is:

C2H2(g) + O2 --> CO2(g) + H2O(l)

02

Calculation of heat

Enthalpy of combustion of acetylene is -1301.1 kJ/mol.

The heat produced by burning 1 mol of acetylene under standard conditions = -1301.1kJ/mol.

Therefore, the heat produced by burning 4mol of acetylene under standard conditions

= 4 脳 (-1301.1 kJ)

= -5204.4 kJ

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