Chemistry questions
29404 published questions with worked solutions.
- Calculate the heat of reaction at 298K for the reaction C_2H_4 + H_ 2(g) C_2H_ 6(g) . Given that the heats of combustion of...
- The value of heat of neutralisation is highest in
- The bond energy of C - H bond in CH_4 from the following data : C_ (g) + 4H_ (g) CH_ 4(g) ; H = -398.7 kcal is about
- The heat of neutralization of one mole of a strong acid (in dilute solution) with one mole of a strong base is
- For an ideal gas the relationship between internal energy change U and enthalpy change H is
- The heat of combustion of carbon is 394 kJ ,mol^ -1 . The heat evolved in combustion of 6.023 10^ 21 atoms of carbon is
- The heats of combustion of yellow phosphorus and red phosphorus are -9.91 kJ and -8.78 kJ respectively. The heat of transition of...
- The relationship between G^0 of a reaction and its equilibrium constant is
- Enthalpy of a compound is equal to its
- The difference between heats of reaction at constant pressure and constant volume for the reaction : 2C_6H_ 6(l) + 15O_ 2(g)...
- In endothermic reaction
- Identify the state function among the following :
- Hess's law deals with
- The enthalpy change for the reaction C_2H_ 2(g) + 5 2 O_ 2(g) 2CO_ 2(g) + H_2O_ (g) Is known as enthalpy of
- For the process, H_2O ,(l) H_2O ,(g) at 100^ C , S is
- The enthalpies of elements in their standard states are taken as zero. Hence, the enthalpy of formation of a compound :
- Which of the following has highest entropy?
- The heat of combustion of methane gas is -212 kcal ,mol^ -1 . Calculate U at 300 K, R = 2 cal ,K^ -1 ,mol^ -1
- Thermodynamics is based on study of __________ of the system
- A process in which system comes to its initial state through a number of different processes is called __________