Normal and standard temperature pressure - stp ntp, Mechanical Engineering

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Normal Temperature and Pressure (N.T.P.):

The conditions of temperature and pressure at 0°C (273K) and 760 mm of Hg respectively are called normal temperature and pressure (N.T.P.).

Standard Temperature and Pressure (S.T.P.):

The temperature and pressure of any gas, under std. atmospheric conditions are taken as 15⁰C and 760 mm of Hg respectively. Some countries take 25⁰C as temperature.

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