Q.28 Define : (i) Extensive and Intensive properties
(ii) Isobaric and Adiabatic processes
What are enzymes?
Write the atomic numbers of transuranium elements.
Best answer
Answer:
(i) Extensive property: a property whose value depends on the amount of matter in the system, e.g. mass, volume, internal energy, enthalpy.
Intensive property: a property whose value is independent of the amount of matter in the system, e.g. temperature, pressure, density, boiling point.
(ii) Isobaric process: a process carried out at constant pressure (ΔP = 0).
Adiabatic process: a process in which no heat is exchanged between the system and the surroundings (q = 0); the system is thermally insulated.
Enzymes: Enzymes are biological catalysts, mostly globular proteins, produced by living cells, that catalyse specific biochemical reactions in the body, e.g. maltase, sucrase, pepsin. They are highly specific and work under mild conditions of temperature and pH.
Transuranium elements: the elements beyond uranium (Z = 92), i.e. those with atomic numbers 93 onwards. In the actinide series they are the elements with atomic numbers 93 (neptunium) to 103 (lawrencium); they are all synthetic and radioactive.
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