In reactions involving solids and liquids (where change in volume is negligible), the heat of reaction at constant pressure as compared to that at constant volume is_______________?

Related Mcqs:

1. Heat of reaction at constant volume is identified with _____________ change?

   A. Enthalpy
   B. Internal energy
   C. Either A. or B
   D. Neither A. nor B

2. Which of the following is Clausius-Clapeyron Equation for vaporisation of an ideal gas under the condition that the molar volume of liquid is negligible compared to that of the vapor ?

   A. d ln p/dt = Hvap/RT2
   B. d ln p/dt = RT2/Hvap
   C. dp/dt = RT2/Hvap
   D. dp/dt = Hvap/RT2

3. Those solutions in which there is no volume change upon mixing the components in the liquid state and which, when diluted do not undergo any heat change (i.e. heat of dilution is zero), are called ____________ solutions?

   A. Ideal
   B. Real
   C. Isotonic
   D. None of these

4. A gas at 0°C was subjected to constant pressure cooling until its volume became half the original volume. The temperature of the gas at this stage will be________________?

   A. 0°C
   B. 0°K
   C. -136.5°C
   D. -136.5°K

5. For a reversible process involving only pressure-volume work____________________?

   A. (dF)T, p 0
   C. (dF)T, p = 0
   D. (dA)T, v < 0

6. For an irreversible process involving only pressure-volume work____________________?

   A. (dF)T, p <0
   B. (dF)T, p = 0
   C. (dF)T, p > 0
   D. (dA)T, v >0

7. ‘Particulate’ air pollutants are finely divided solids and liquids. Which of the following is not a „particulate‟ ?

   A. Dust & mists
   B. Smoke & fumes
   C. Photochemical smog & soot
   D. None of these

8. If the molar heat capacities (Cp or Cv) of the reactants and products of a chemical reaction are identical, then, with the increase in temperature, the heat of reaction will___________________?

   A. Increase
   B. Decrease
   C. Remain unaltered
   D. Increase or decrease; depends on the particular reaction

9. The variation of heat of reaction with temperature at constant pressure is given by the ____________ law?

   A. Kelvin’s
   B. Antoine’s
   C. Kirchoff’s
   D. None of these

10. Specific _____________ does not change during phase change at constant temperature and pressure?

    A. Entropy
    B. Gibbs energy
    C. Internal energy
    D. Enthalpy