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Thermal Properties of Matter

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Question : 1 of 22
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The triple points of neon and carbon dioxide are 24.57 K and 216.55 K respectively. Express these temperatures on the Celsius and Fahrenheit scales.
Solution:  
Here, Triple point of neon, T1=24.57 KT_1 = 24.57\,\mathrm{K}
Triple point of CO2, T2=216.55 K\mathrm{CO}_2,\ T_2 = 216.55\,\mathrm{K}
Relation between kelvin scale and celsius scales
TC=TK−273.15T_C = T_K - 273.15
where TC=T_C = Temperature on celsius scale
TK=T_K = Temperature on kelvin scale
For neon TC=24.57−273.15=−248.58∘CT_C = 24.57 - 273.15 = -248.58^{\circ}\mathrm{C}
For CO2, TC=216.55−273.15\mathrm{CO}_2,\ T_C = 216.55 - 273.15
=−56.60∘C= -56.60^{\circ}\mathrm{C}
Relation between kelvin and Fahrenheit scales is
F=95C+32F = \frac{9}{5}C + 32
For neon TF=95×(−248.58)+32T_F = \frac{9}{5} \times (-248.58) + 32
=−415.44∘ F= -415.44^{\circ}\,\mathrm{F}
For CO2 TF=95×(−56.60∘)+32\mathrm{CO}_2\ T_F = \frac{9}{5} \times (-56.60^{\circ}) + 32
=−69.88∘ F= -69.88^{\circ}\,\mathrm{F}
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