 #1
DottZakapa
 239
 17
 Homework Statement:

Calculate the standard enthalpy change related to the production of 2.00L of ethanol(##CH_3CH_2OH##, ##d=0,79\frac {g}{cm^3} ##)through the reaction
##CH_{2(g)}+H_2O_{l}>CH_3CH_2OH_{(l)}##
 Relevant Equations:
 thermochemistry
from table the standard enthalpy of ethanol is ##\Delta H°=277 \frac{KJ}{mol}##
the grams of ethanol are
##0,002 cm^3*0,79\frac {g}{cm^3}=1,58*10^{3}g##
and the moles are
##\frac{1,58*10^{3}g}{(24,02+16,00+6,06)\frac g {mol}}= 3,43*10^{5}##mol
By proportionality, having already the standard enthalpy for 1 mol of ethanol, the enthalpy change wil be
## 3,43*10^{5}*277 \frac{KJ}{mol}##=
is this procedure correct? result doesn't match book expected result. Any help?
the grams of ethanol are
##0,002 cm^3*0,79\frac {g}{cm^3}=1,58*10^{3}g##
and the moles are
##\frac{1,58*10^{3}g}{(24,02+16,00+6,06)\frac g {mol}}= 3,43*10^{5}##mol
By proportionality, having already the standard enthalpy for 1 mol of ethanol, the enthalpy change wil be
## 3,43*10^{5}*277 \frac{KJ}{mol}##=
is this procedure correct? result doesn't match book expected result. Any help?