611. A system in which the surrounding environment does not exchange energy, work, or matter is:
A. Closed
B. Isolated
C. Adiabatic
D. Isothermal
612. In thermodynamics which one of the following is definitely not an escalated property?
A. Pressure
B. Density
C. Volume
D. Temperature
613. When 50 cm3 of 0.2 n H2SO4 is mixed with 50 cm3 of 1 N KOH, the power freed is:
A. 11.46 kJ
B. 57.3 Kj
C. 573 Kj
D. 573 J
614. 1 Mole of H2SO4 is mixed with 2 moles of NAOH. The heat evolved will be:
A. 57.3 kJ
B. 59.3 kJ
C. 61.3 kJ
D. Cannot be predicted
615. The enthalpies of ignition of carbon and carbon monoxide are – 395 and 293 kJ mol-1, respectively. The enthalpy of carbon monoxide formation per mole is:
A. 110.5 kJ
B. -116.5 kJ
C. -676.5 kJ
D. 676.5 kJ
616. A cylinder of gas supplied by PSO is assumed to contain 14 kg of butane if a normal family requires 20,000 kJ of energy per day for cooking, butane gas in the cylinder lasts for __ days (Hc of C4H10 = -2658 kJ per mole):
A. 15 DAYS
B. 20 days
C. 50 days
D. 32 days
617. When an aqueous solution containing 0.5 moles of HNO3 and 0.3 moles of OH is mixed (the enthalpy of neutralization is -57.1 kJ), how much heat would be released?
A. 28.5 KJ
B. 17.1 kJ
C. 45.7 kJ
D. 1.70 kJ
618. In the equilibrium N2 + 3H2 = 2NH3 + 22 KCl, the formation of ammonia is favored by:
A. Increasing the pressure
B. Increasing the temperature
C. Decreasing the pressure
D. Adding ammonia
619. If the concentration of the reactants is doubled in a chemical reaction that is reversible and has two reactants in equilibrium, the equilibrium constant will:
A. Also be doubled
B. Be halved
C. Become one fourth
D. Remain the same
620. One mole of an ideal gas expands isothermally to ten times its original volume. The change in entropy is:
A. 0.1 R
B. 2.303 R
C. 10.0 R
D. 100.0 R
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