CHEM 1A Chapter Notes - Chapter 2A: Butane, Thermodynamic Cycle
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When reactants in their standard states change into products in their standard states standard conditions : l m , usually 25 c f. Standard enthalpy : ohof = o standard enthalpy of formation of an element in its most stable form is zero ( standard states can be defined for any t ) enthalpy of formation , The change in enthalpy when one mole of a substance is formed from its elements under standard pressure of 1 atm. 0 hi ( products) - oh fo ( reactants ) - oh rxn. 2 mot cy heo i 5756 kj mo l of fuel molecules. 5756 kj mol of fuel molecules i 0 . 122 mot cy hao g of cy heo. The backpacker should carry 7. 07g of butane in order to boil l l of water. Because hz molecule exists as a complete duet in which costs energy to be pulled apart.
