30202. A Carnot cycle consists of the following steps :
30203. For a cyclic process, a fixed ratio between heat and work
30204. Which of the following is not a common refrigerant ?
30205. The most important application of distribution law is in
30206. Order levels and EOQ relate to control of
30207. Air-refrigeration cycle
30208. In vapour compression refrigeration system, if the evaporator temperature and the condenser temperatures are -13°C and 37°C respetively, the Carnot COP will be
30209. Gibbs free energy of mixing at constant pressure and temperature is always
30210. The compressibility factor for an ideal gas is 1. Its value for any other real gas is
30211. If two gases have same reduced temperature and reduced pressure, then they will have the same
30212. Which of the following is an extensive property of a system ?
30213. The reaction A (l) R(g) is allowed to reach equilibrium conditions in an autoclave. At equilibrium, there are two phases, one a pure liquid phase of A and the other a vapor phase of A, R and S. Initially A alone is present. The number of degrees of freedom are
30214. Cp - Cv = R is valid for __________ gases.
30215. At a given temperature, the volume of a gas dissolved in a solvent __________ with increase in pressure.
30216. Which is an example of closed system ?
30217. Melting of wax is accompanied with __________ in entropy.
30218. A thermodynamic system is taken from state A to B along ACB and is brought back to A along BDA as shown below in the P-V diagram. The net work done during the complete cycle is given by the area covered by
30219. Work done in case of free expansion is
30220. Chemical potential (an intensive property) of a substance is a force that drives the chemical system to equilibrium and is equal to its partial molar properties. The reatio of chemical potential to free energy of a pure substance at oconstant temperature and pressure is
30221. During adiabatic expansion of gas
30222. For the reversible exothermic reaction, N2 + 3H2 2NH3, increase of pressure would
30223. Which of the following has the minimum value of COP for a given refrigeration effect?
30224. __________ decreases during adiabatic throttling of a perfect gas.
30225. Dividend paid is shown by a Company in
30226. Tea kept in a thermos flask is vigorously shaken. If the tea is considered as a system, then its temperature will
30227. Change of heat content when one mole of compound is burnt in oxygen at constant pressure is called the
30228. Clausius - Clayperon equation is applicable to __________ equilibrium processes.
30229. In which of the following reaction equilibria, the value of equilibrium constant Kp will be more than is Kc ?
30230. After throttling, gas temperature
30231. The chemical potential for a pure substance is __________ its partial molal free energy.
30232. When liquid and vapour phase of multi-component system are in equilibrium (at a given temperature and pressure), then chemical potential of each component is
30233. COP of a refrigerator drawing 1 kW of power per ton of refrigeration is about
30234. The number of degrees of freedom for a mixture of ice and water (liquid) are
30235. On opening the door of an operating refrigerator kept in a closed room, the temperature of the room will
30236. Domestic refrigerator usually works on the __________ refrigeration cycle.
30237. Gibbs-Duhem equation
30238. Minimum number of phases that exists in a system is 1. Number of chemical species in a colloidal system is
30239. The internal energy of a gas obeying P (V - b) RT (where, b is a positive constant and has a constant Cv), depends upon its
30240. "When a gas is expanded from high pressure region to low pressure region ; temper -ature change occurs". This phenomenon is related to the
30241. The internal energy of an ideal gas does not change in a reversible __________ process.
30242. A/an __________ system is exemplified by a vessel containing a volatile liquid in contact with its vapor.
30243. In a P-V diagram (for an ideal gas), an isothermal curve will coincide withan adiabatic curve (through a point), when
30244. For an ideal gas, the chemical potential is given by
30245. Two substances are in equilibrium in a reversible chemical reaction. If the concentration of each substance is doubled, then the value of the equilibrium constant will be
30246. In the ammonia synthesis reaction, N2 + 3H2 2NH3 + 22.4 kcal, the formation of NH3 will be favoured by
30247. Entropy change for an irreversible isolated system is
30248. Heat requirement for decomposition of a compound into its elements is __________ that is evolved during the formation of that compound from its elements.
30249. The unit of equilibrium constant of a chemical reaction is the same as that of
30250. Which of the following equations is obtained on combining 1st and 2nd law of thermodynamics, for a system of constant mass?
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