4Fe +30 2+ 2Fe 203 How many moles of Fe2O3 are produced when 112 grams of Fe is reacted? (Fe = 56g, Fe2O3 = 160g)
А
1 mole Fe 203
B
2.67 mole Fe 203
С
1.3 mole Fe 203
D
4 mole Fe 203

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the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.

the answer is d. 74.02