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2 Jun 2009 17:35:19 IST

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what is the difference between NTP and STP?

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what is the difference between NTP and STP?

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NugoRama

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2 Jun 2009 17:36:44 IST

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they are the same ..exactly the same. NTP : normal temperature and pressure ..STP : standard temperature and pressure .. NORMALLY we use STANDARD conditions . the end.

Karanveer Singh

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2 Jun 2009 17:39:12 IST

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Same thing..diff names...!

eragon24

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2 Jun 2009 17:39:14 IST

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STP - Standard Temperature and Pressure - is defined by IUPAC (International Union of Pure and Applied Chemistry) as air at 0^oC (273.15 K, 32^oF) and 10⁵ pascals (1 Pa = 10^-6 N/mm² = 10^-5 bar = 0.1020 kp/m² = 1.02x10^-4 m H₂O = 9.869x10^-6 atm = 1.45x10^-4 psi (lbf/in²))

NTP - Normal Temperature and Pressure - is defined as air at 20^oC (293.15 K, 68^oF) and 1 atm ( 101.325 kN/m², 101.325 kPa, 14.7 psia, 0 psig, 29.92 in Hg, 760 torr). Density 1.204 kg/m³ (0.075 pounds per cubic foot)

Aakash Anuj

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2 Jun 2009 21:52:09 IST

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They are exactly the same thing.NTP - Normal temperature and pressureSTP - Standard temperature and pressureThere is also an RTP - Room temperature and pressureIt has temperature 25 degree celsuisSo i hope that you will never ever confuse again....Please rate...

archie

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2 Jun 2009 22:59:22 IST

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ti think that they r diffferent n the answer given above by akash is correct

NugoRama

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2 Jun 2009 23:02:48 IST

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@deepak ..sourse please ..cos i doubt ntp to be at 20 degrees..

pranshu phuloria

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11 Feb 2012 17:03:41 IST

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STP :Standard temperature and pressure, abbreviated STP, refers to nominal conditions in the atmosphere at sea level. This value is important to physicists, chemists, engineers, and pilots and navigators. Standard temperature is defined as zero degrees Celsius (0 0C), which translates to 32 degrees Fahrenheit (32 0F) or 273.15 degrees kelvin (273.15 0K). This is essentially the freezing point of pure water at sea level, in air at standard pressure. Standard pressure supports 760 millimeters in a mercurial barometer (760 mmHg). This is about 29.9 inches of mercury, and represents approximately 14.7 pounds per inch (14.7 lb/in2). Imagine a column of air measuring one inch square, extending straight up into space beyond the atmosphere. The air in such a column would weigh about 14.7 pounds. The density of air at STP is approximately 1.29 kilogram per meter cubed (1.29 kg/m3). This fact comes as a surprise to many people; a cubic meter of air weighs nearly three pounds! NTP :Normal Temperature and Pressure - is defined as air at 20oC (293.15 K, 68oF) and 1 atm ( 101.325 kN/m2, 101.325 kPa, 14.7 psia, 0 psig, 29.92 in Hg, 760 torr). Density 1.204 kg/m3 (0.075 pounds per cubic footThus the difference is iin temperature in case of STP it is 0 deg C, while in case of NTP it is 20 deg. C.

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