At constant volume of a system remains constant and the heat is absorbed by the system, them amount of heat absorbed is called

• Enthaply change of the system A
• Internal energy change of the system B
• Total enthalphy of the system C
• Total internal energy of the system D

The change in heat energy of a chemical reaction at constant temperature and pressure is called

• Enthalpy change A
• Bond energy B
• Heat of sublimation C
• Internal energy change D

Which substance have delta E = Delta H and no pressure - volume work.

• Liquids only A
• Solids only B
• Gases only C
• Liquids and solids D

The heat contents of the system of known as.

• Entropy A
• Enthalpy B
• Work C
• Free energy D

Which of the following value of heat of formation indicates that the product is least stable.

• -94 KJ A
• -231.6 KJ B
• +21.4 KJ C
• +70 KJ D

Most of the reaction which give stable products are

• Exothermic A
• Endothermic B
• Isothermal C
• None of these D

• 
  A
• 
  B
• 
  C
• 
  D

The change in heat energy of a chemical reaction at constant temperature and pressure is called.

• Enthalpy change A
• Bond energy B
• Heat of sublimation C
• Internal energy change D

The standard heat of formation is measured at 1 atmosphere and

• 0 ^oC A
• 100 ^oC B
• 293 ^oC C
• 25 ^oC D

the value of delta H and delta E for liquids and solids is almost same because.

• No change in temperature A
• Heat absorbed B
• No change in volume C
• Heat evolved D

Which is not is state function

• Enthalpy A
• Entropy B
• Pressure C
• work D

Which one of the following enthalpies is always an exothermic process.

• Enthalpy of atomization A
• Enthalpy of neutralization B
• Enthalpy of ionization C
• Enthalpy of dissociation D

One of the following statements about Born-Haber cycle is correct. Which is that statement

• Born-Haber cycle is different from Hess's law A
• The energy change in a cyclic process is not zero B
• The lattice energy of the crystalline substances can be calculated easily C
• Heat of formation of the product and the lattice energy of the substance can be calculated simultaneously D

The net heat change in a chemical reaction is same whether it is brought about in two or more different ways in one or several steps. It is knnown as

• Henry's law A
• Hess's law B
• Joule's principle C
• Law of combustion D

The born Haber cycle is the best application of law.

• Boyle's A
• Dalton's B
• Hess's C
• Graham's D

The enthalpy of combustion is

• Positive A
• Negative B
• Either positive or negative C
• No correlation D

Which of the following statement is contrary to the first law of thermodynamics

• An equivalent amount of heart energy can neither be created nor destroyed A
• One form of energy can be transferred into an equivalent amount of other kinds of energy B
• In an adiabatic process, the work done is independent of its path C
• Continuous production of mechanical work without supplying an equivalent is amount of heat possible D