NH4COONH2 (s) 2NH3 (g) + CO2 (g) ,if equlibrium pressure is 3 atm for the above reaction .Kp for the reaction is :
4
27
4/27
1/27
A radioactive nucleus will not emit :
alpha and beta rays simultaneously
beta and gamma rays simultaneously
gamma and alpha rays
gamma rays only
If the Vrms is 30 R1/2 at 27oC then calculate the molar mass of gas in kilogram .
1 Kg
2 Kg
0.001 Kg
0.002 Kg
The standard molar heat of formation of ethane ,CO2 and water are respectively - 21.1 , - 94.1 and - 68. 3 kcal .The standard molar heat of combustion of ethane will be :
- 372 kcal
162 kcal
- 240 kcal
183.5 kcal
A.
- 372 kcal
Combustion equation for ethane is :
C2H6 (g) + O2 (g) 2CO2 (g) + 3H2O (g) = ?
= { products} - { reactants}
= {2 (CO2) + 3Hf (H2O)} - { (C2H6) + 7/2 (O2)}
{2 X (- 94.1) + 3 X (- 68.3)} - {(-21.1) + 7/2(O)}
={- 1888.2 - 204.9} - {-21.1}
= - 393.1 + 21.1
= - 372 kcal