Chemistry questions
29404 published questions with worked solutions.
- Which of the following has S^0 greater than zero?
- Since enthalpy of elements in their natural state is taken to be zero, the heat of formation ( H_f) of compounds
- Enthalpy of vapourization of naphthalene is 48.5 kJ ,mol^ -1 , enthalpy of fusion of naphthalene is 22.5 kJ ,mol^ -1 , then...
- It is given : H_2O_ (s) H_2O_ (l) ; H = 6.05 kJ H_2O_ (l) H_2O_ (g) ; H = 43.7 kJ The heat of sublimation of ice at 273 K is
- 2 mole of an ideal gas at 27^ 0 C temperature is expanded reversibly from 2 lit to 20 lit. Find entropy change. (R = 2 cal/mole K)
- For the spontaneity of a reaction which statement is true?
- In which of the following entropy decreases?
- Heat of combustion of S (Rhombic) and S (Monoclinic) are -297.5 kJ and -300 kJ ,mol^ -1 respectively. So the heat of...
- Maximum entropy should be of
- For a reaction to be spontaneous at all temperatures
- Which law of thermodynamics introduces the concept of entropy?
- Value of H and S for five different reaction are given below : Reaction: H ( kJ ,mol^ -1 ) ; S ( kJ ,mol^ -1 ) I: +98.0 ; +14.8...
- What is the free energy change, G when 1.0 mole of water at 100^ 0 C and 1 atm pressure is converted into steam at 100^ 0 C and 1...
- Disorder in any substance depends on
- Units of entropy is
- The entropy of a perfectly crystalline solid at absolute zero is
- The thermodynamics process where no change in enthalpy takes place is [MHT-CET 2001]
- If same amounts of each of the four gases were taken, on expanding from a volume V_1 to V_2 the maximum work will be done in the...
- If the heat of neutralization of a strong acid with strong base is -57 kJ, the same for 0.1 N, H_2SO_4 with 0.3 N, NaOH is
- Heat of formation of SO_2 is -298 kJ. What is the heat of combustion of 4 gms of SO_2 ? [MHT-CET 2005]