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Since 1982, STP has been defined as a temperature of 273.15 K (0 °C, 32 °F) and an absolute pressure of exactly 1 bar (100 kPa, 10 5 Pa). NIST uses a temperature of 20 °C (293.15 K, 68 °F) and an absolute pressure of 1 atm (14.696 psi, 101.325 kPa). [3] This standard is also called normal temperature and pressure (abbreviated as NTP).
Heat capacity, c p? J/(mol K) Liquid properties Std enthalpy change of formation, Δ f H o liquid –198.7 kJ/mol Standard molar entropy, S o liquid: 295 J/(mol K) Enthalpy of combustion, Δ c H o –4163 kJ/mol Heat capacity, c p: 197.66 J/(mol K) Gas properties Std enthalpy change of formation, Δ f H o gas –167.2 kJ/mol Standard molar ...
September and October, the driest months of the year, qualify as "Indian Summer" weather with temperatures that are near 78 °F (26 °C) during the daytime. At night, the temperature drops to near 50 °F (10 °C). It is much cooler in November with an average high of 62 °F (17 °C) and low of 36 °F (2 °C).
6 Density of ethanol at various temperatures. 7 Properties of aqueous ethanol solutions. ... Freezing temperature, °C 10 °C 20 °C 25 °C 30 °C 0.0: 0.0: 0.0: 0. ...
The highest reliably recorded temperature in the world, [6] [7] 134 °F (56.7 °C), was recorded in Death Valley on July 10, 1913. Temperatures of 130 °F (54 °C) or higher have been recorded as recently as 2005. The 24-hour average July temperature in Death Valley is 101.8 °F (38.8 °C) (1981–2010 NCDC Normals).
Downstate nights typically range between 27–31 °F. The record low for New York state is −52 °F (−47 °C), set at Stillwater Reservoir on February 9, 1934 and at Old Forge on February 18, 1979. [3] In February 2015, Rochester experienced its coldest month ever, with an average temperature of 12.2 °F (−11 °C). [7]
Normal January mean temperature: 46.0 °F (7.8 °C). The coldest month in recorded history was January 1977, averaging 35.7 °F (2.1 °C). January 1981 had a colder average minimum of 25.8 °F (−3.4 °C). Normal July mean temperature: 81.1 °F (27.3 °C). The hottest month in recorded history was July 2012, averaging 84.7 °F (29.3 °C).
For example, the months with the highest record high temperatures are September at 111 °F (44 °C) and October at 107 °F (42 °C). [4] The record high temperature at the National Weather Service office in San Diego of 111 °F (44 °C) was on September 26, 1963. The record low temperature was 25 °F (−4 °C) on January 7, 1913. [8]