What do you mean by NTP (normal temperature and pressure) and STP (standard temperature and pressure)?

  • 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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stp means temparature=273.15k and pressure =1.01356322bar and at dis condition 1 mole of any gases occupies 22.4 litres 

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