Home
Class 11
CHEMISTRY
Calculate the enthalpy of formation of e...

Calculate the enthalpy of formation of ethane from the follwong enthalpy of combustion data:
C(s) : - 393.5 kJ, H_(2)(g) : - 285.8 kJ and `C_(2)H_(6)(g) : - -1560.0 kJ`

Text Solution

AI Generated Solution

To calculate the enthalpy of formation of ethane (C₂H₆) from the given enthalpy of combustion data, we can use Hess's law. Here’s a step-by-step solution: ### Step 1: Write the combustion reactions We have the following combustion reactions for carbon, hydrogen, and ethane: 1. **Combustion of Carbon (C)**: \[ C(s) + O_2(g) \rightarrow CO_2(g) \quad \Delta H_c = -393.5 \text{ kJ} ...
Promotional Banner

Topper's Solved these Questions

  • THERMODYNAMICS

    MODERN PUBLICATION|Exercise Competition File (Integer Type Questions)|6 Videos
  • STRUCTURE OF ATOM

    MODERN PUBLICATION|Exercise Unit Practice Test|13 Videos

Similar Questions

Explore conceptually related problems

Calculate the enthalpy of formation of ethane from the following data : (i) C(s) + O_(2)(g) to CO_(2)(g) , Delta_(r)H^(@) = -393.5 kJ (ii) H_(2)(g) + 1/2 O_(2)(g) to H_(2)O(l), Delta_(r)H^(@) = -285.8 kJ (iii) C_(2)H_(6)(g) + 7/2O_(2)(g) to 2CO_(2)(g) + 3H_(2)O(l), Delta_(r)H^(@) = -1560.0 kJ

Calculate the enthalpy of formation of methane from the following data : C(s) + O_(2)(g) to CO_(2)(g) Delta_(r)H^(@) = -393.5 kJ 2H_(2)(g) + O_(2)(g) to 2H_(2)O(l) Delta_(r)H^(@) = -571.8 kJ CH_(4)(g) + 2O_(2)(g) to CO_(2)(g) + 2H_(2)O(l) Delta_(r)H^(@) = -890.3 kJ

Calculate the enthalpy of formation of ethyl alcohol from the following data : C_(2)H_(5)OH(l) + 3O_(2)(g) to 2CO_(2)(g) + 3H_(2)O(l), Delta_(r)H^(@) = -1368.0 kJ C(s) +O_(2)(g) to CO_(2)(g), Delta_(r)H^(@) = -393.5 kJ H_(2)(g) + 1/2O_(2)(g) to H_(2)O(l), Delta_(r)H^(@) = -286.0 kJ

Calculate the standard enthalpy of formation of ethylene, C_(2)H_(4)(g) from the following thermochemical equation : C_(2)H_(4)(g) + 3O_(2)(g) to 2CO_(2)(g) + 2H_(2)O(g) Delta_(r)H^(@) = -1323 kJ Given the standard enthalpy of formation of CO_(2)(g) and H_(2)O(g) are - 393.5 and -249 kJ mol^(-1) respectively.

The combustion of butane (C_(4)H_(10)) is exothermic by 2878.7 kJ "mol"^(-1) .Calculate the standard enthalpy of formation of butane given that the standard enthalpies of formation of CO_(2)(g) and H_(2)O(l) are -393.5 kJ "mol"^(-1) and -285.8 kJ "mol"^(-1) respectively.