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ICSE Class 9 Answered

a gas occupies a volume of 400cm cube. On heating to 127 degree Celsius it's it's volume becomes 1600cm cube. Find the initial temperature of gas on Celsius scale . assume pressure remains constant.
Asked by joachimdungdung | 21 Oct, 2018, 07:53: PM
answered-by-expert Expert Answer
Given:
 
V1 = 400 cm3 
 
V2 = 1600 cm3 
 
T2 = 127 °C
 
    =400 K
 
T1 = ?
 
According to Charles's law,
 
straight V subscript 1 over straight T subscript 1 space equals space straight V subscript 2 over straight T subscript 2 straight T subscript 1 space end subscript equals fraction numerator straight V subscript 1 cross times straight T subscript 2 over denominator straight V subscript 2 end fraction space space space space space equals fraction numerator 400 cross times 400 over denominator 1600 end fraction space space space space space space equals 100 space straight K straight T subscript 1 space end subscript space equals open parentheses negative 173 space to the power of degree straight C close parentheses
 
The initial temperature is 173 °C.
Answered by Varsha | 22 Oct, 2018, 11:50: AM

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