The activity bare to access the temperature of a accustomed accumulation of baptize by 1 В°C depends on the atmospheric burden and the starting temperature. Accordingly, several altered complete definitions of the calorie accept been used.
The burden is usually taken to be the accepted atmospheric burden (101.325 kPa). The temperature access can be bidding as one kelvin, which agency the aforementioned as an accession of one bulk Celsius.
Name Symbol Conversions Notes
Thermochemical calorie calth в‰Ў 4.184 J
≈ 0.003964 BTU ≈ 1.163×10−6 kWh ≈ 2.611×1019 eV
the bulk of activity according to absolutely 4.184 joules [4][5][6][7]
4 °C calorie cal4 ≈ 4.204 J
≈ 0.003985 BTU ≈ 1.168×10−6 kWh ≈ 2.624×1019 eV
the bulk of activity appropriate to balmy one gram of air-free baptize from 3.5 to 4.5 В°C at accepted atmospheric pressure.
15 °C calorie cal15 ≈ 4.1855 J
≈ 0.0039671 BTU ≈ 1.1626×10−6 kWh ≈ 2.6124×1019 eV
the bulk of activity appropriate to balmy one gram of air-free baptize from 14.5 to 15.5 В°C at accepted atmospheric pressure. Beginning ethics of this calorie ranged from 4.1852 J to 4.1858 J. The CIPM in 1950 arise a beggarly beginning bulk of 4.1855 J, acquainted an ambiguity of 0.0005 J.[4]
20 °C calorie cal20 ≈ 4.182 J
≈ 0.003964 BTU ≈ 1.162×10−6 kWh ≈ 2.610×1019 eV
the bulk of activity appropriate to balmy one gram of air-free baptize from 19.5 to 20.5 В°C at accepted atmospheric pressure.
Mean calorie calmean ≈ 4.190 J
≈ 0.003971 BTU ≈ 1.164×10−6 kWh ≈ 2.615×1019 eV
1вЃ„100 of the bulk of activity appropriate to balmy one gram of air-free baptize from 0 to 100 В°C at accepted atmospheric pressure.
International Steam table calorie (1929) ≈ 4.1868 J
≈ 0.0039683 BTU ≈ 1.1630×10−6 kWh ≈ 2.6132×1019 eV
1вЃ„860 all-embracing watt hours = 180вЃ„43 all-embracing joules exactly.[note 1]
International Steam Table calorie (1956) calIT в‰Ў 4.1868 J
≈ 0.0039683 BTU ≈ 1.1630×10−6 kWh ≈ 2.6132×1019 eV
1.163 mWВ·h = 4.1868 J exactly. This analogue was adopted by the Fifth All-embracing Conference on Properties of Steam (London, July 1956).[4]
Jump up ^ The amount depends on the about-face agency amid all-embracing joules and complete (modern) joules. Application the beggarly all-embracing ohm and volt (1.00049 О©, 1.00034 V[8]), the all-embracing joule is about 1.00019 J, application the US all-embracing ohm and volt (1.000495 О©, 1.000330 V) it is about 1.000165 J, giving 4.18684 J and 4.18674 J, respectively.
2. The two definitions a lot of accepted in earlier abstract arise to be the 15 В°C calorie and the thermochemical calorie.
The burden is usually taken to be the accepted atmospheric burden (101.325 kPa). The temperature access can be bidding as one kelvin, which agency the aforementioned as an accession of one bulk Celsius.
Name Symbol Conversions Notes
Thermochemical calorie calth в‰Ў 4.184 J
≈ 0.003964 BTU ≈ 1.163×10−6 kWh ≈ 2.611×1019 eV
the bulk of activity according to absolutely 4.184 joules [4][5][6][7]
4 °C calorie cal4 ≈ 4.204 J
≈ 0.003985 BTU ≈ 1.168×10−6 kWh ≈ 2.624×1019 eV
the bulk of activity appropriate to balmy one gram of air-free baptize from 3.5 to 4.5 В°C at accepted atmospheric pressure.
15 °C calorie cal15 ≈ 4.1855 J
≈ 0.0039671 BTU ≈ 1.1626×10−6 kWh ≈ 2.6124×1019 eV
the bulk of activity appropriate to balmy one gram of air-free baptize from 14.5 to 15.5 В°C at accepted atmospheric pressure. Beginning ethics of this calorie ranged from 4.1852 J to 4.1858 J. The CIPM in 1950 arise a beggarly beginning bulk of 4.1855 J, acquainted an ambiguity of 0.0005 J.[4]
20 °C calorie cal20 ≈ 4.182 J
≈ 0.003964 BTU ≈ 1.162×10−6 kWh ≈ 2.610×1019 eV
the bulk of activity appropriate to balmy one gram of air-free baptize from 19.5 to 20.5 В°C at accepted atmospheric pressure.
Mean calorie calmean ≈ 4.190 J
≈ 0.003971 BTU ≈ 1.164×10−6 kWh ≈ 2.615×1019 eV
1вЃ„100 of the bulk of activity appropriate to balmy one gram of air-free baptize from 0 to 100 В°C at accepted atmospheric pressure.
International Steam table calorie (1929) ≈ 4.1868 J
≈ 0.0039683 BTU ≈ 1.1630×10−6 kWh ≈ 2.6132×1019 eV
1вЃ„860 all-embracing watt hours = 180вЃ„43 all-embracing joules exactly.[note 1]
International Steam Table calorie (1956) calIT в‰Ў 4.1868 J
≈ 0.0039683 BTU ≈ 1.1630×10−6 kWh ≈ 2.6132×1019 eV
1.163 mWВ·h = 4.1868 J exactly. This analogue was adopted by the Fifth All-embracing Conference on Properties of Steam (London, July 1956).[4]
Jump up ^ The amount depends on the about-face agency amid all-embracing joules and complete (modern) joules. Application the beggarly all-embracing ohm and volt (1.00049 О©, 1.00034 V[8]), the all-embracing joule is about 1.00019 J, application the US all-embracing ohm and volt (1.000495 О©, 1.000330 V) it is about 1.000165 J, giving 4.18684 J and 4.18674 J, respectively.
2. The two definitions a lot of accepted in earlier abstract arise to be the 15 В°C calorie and the thermochemical calorie.
No comments:
Post a Comment