what is normal temperature and pressure or standard temperature and pressure

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Solution

STP stands for standard temperature and pressure. These standards have been set by the IUPAC. For STP conditions, the temperature is 273.15K (0⁰ C) and pressure is 1 bar (10⁵ Pascals).
NTP is defined as normal temperature and pressure. For NTP conditions, the temperature is 293.15 K (20⁰C) and pressure is 1 atm pressure which is equal to 1.01325X 10⁵ Pascals.

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The standard temperature and pressure values are:

Column-I	Column-II
(a) SATP	(p) 1 bar/ 1 atm
(b) Temperature in STP	(q) ${99.6}^{o} C$
(c) Pressure in NTP	(r) 273.15 K
(d) Standard boiling point of water	(s) 298.15 K

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