Chemistry questions
29404 published questions with worked solutions.
- In a reaction, Normal egg Hard boiled egg: S is _________
- The enthalpy of vaporization of a substance is 840 J per mol and its boiling point is -173 °C. Calculate its entropy of...
- If 900 J/g of heat is exchanged at boiling point of water, then what is increase in entropy?
- 9.0 g of H_2O is vaporised at 100 °C and 1 atm pressure. If the latent heat of vaporization of water is x J/g, then S is given by...
- In which of the following entropy decreases?
- Calculate the free energy change for 2CuO_ (s) Cu_2O_ (s) + 1 2 O_ 2(g) (Given: H = 145.6 kJ ,mol^ -1 , T = 300 K, S = 116 J...
- For reaction 2Cl_ (s) Cl_ 2(s) , the signs of H and S respectively are ______
- The enthalpy change for the transition of liquid water to steam, _ vap H = 37.3 kJ ,mol^ -1 at 373 K. The entropy change for the...
- The essential condition for the feasibility of a reaction is that ________
- For the transition C_ (diamond) C_ (graphite) ; H -1.5 kJ. It follows that _________
- In which of the following reactions, H is greater than U?
- The table given below lists the bond dissociation energy (E_ diss ) for single covalent bonds formed between C and atoms A, B, D,...
- For which reaction from the following, S will be maximum?
- Which of the following is the CORRECT expression for S?
- The value of entropy in solar system is _____
- Which of the following statements is INCORRECT about Born-Haber cycle?
- The S for the vaporization of 1 mol of water is 88.3 J/mol K. The value of S for the condensation of 1 mol of vapour will be _____
- A reaction that takes place with the absorption of energy is _____
- Which of the following conditions will apply conversion of ice into water? Each option gives the signs of H, S and the sign of G.
- Given: _ ion H^ ( HCN ) = 45.2 kJ mol^ -1 and _ ion H^ ( CH_3COOH ) = 2.1 kJ mol^ -1 . Which one of the following facts is TRUE?