per mole reaction.
per mole reaction.
of a substance? 
for the most stable allotrope of each element under standard conditions. For example, oxygen 
(not ozone 
) is the most stable allotrope of oxygen. Also, under STP 
from itself does not involve any chemical or physical change. As a result, 
in particular) and the sign of the enthalpy changes.
: 
;
: 
;
: 
;
: 
;
: 
;
: 
(or simply 
from enthalpies of formation?
to show that this value takes the coefficients into account.Multiply the enthalpy of formation of each reactant by its coefficient in the equation.Find the sum of these values. Label the sum 
to show that this value takes the coefficient into account.Change = Final - Initial. So is the case with enthalpy changes. 
. 
;
;
.
.Calculate delta h in kj for the following reactions using heats of formation:
a) 2c2h6 (g) +...
Chemistry, 04.02.2020 20:45 tyliyahmiles99
Calculate delta h in kj for the following reactions using heats of formation:
a) 2c2h6 (g) + 7o2 (g) > 4co2 (g) +6h2o (g)
b) 2pbo (s) + pbo2 (s) > pb3o4 (s)
Answers: 1
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