- #1

DottZakapa

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- 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?