calculate heat of formation of C2H4 from the following data
2C + 202 → 2CO2 + 194 K. cals
2 H50 + 02 → 2H20 + 136 K.cals.
C2H4 + 302 → 2C0, +2H2O + 340 K.cals. (40 K.cals)
IV. Calculate hent of fo
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Answer:
Answer : The enthalpy change is -1415 kJ
Explanation :
The given balanced chemical reaction is,
Formula used :
where,
= change in enthalpy = ?
= change in internal energy =
= change in moles = [(2+2)-(3+1)] = 0 (from reaction)
R = gas constant = 8.314 J/mol.K
T = temperature =
Now put all the given values in the above formula, we get:
Therefore, the enthalpy change is -1415 kJ
Explanation:
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