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Sejumlah gas diatomik pada suhu 120 °C dan tekanan   mempunyai volume 4 L Gas ini mengalami proses isobarik hingga volumenya 4,8 L lalu proses isokhorik hingga tekananya . Berapa kerja total gas?

Pertanyaan

Sejumlah gas diatomik pada suhu 120 °C dan tekanan begin mathsize 14px style 8 cross times 10 to the power of 4 space straight N divided by straight m squared end style  mempunyai volume 4 L Gas ini mengalami proses isobarik hingga volumenya 4,8 L lalu proses isokhorik hingga tekananya begin mathsize 14px style 6 cross times 10 to the power of 4 space straight N divided by straight m squared end style. Berapa kerja total gas?

Pembahasan Soal:

Diketahui :

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell V subscript A end cell equals cell 4 space straight L equals 4 cross times 10 to the power of negative 3 end exponent space straight m cubed end cell row cell V subscript B end cell equals cell 4 comma 8 space straight L equals 4 comma 8 cross times 10 to the power of negative 3 end exponent space straight m cubed end cell row cell V subscript C end cell equals cell V subscript B equals 4 comma 8 space straight L equals 4 comma 8 cross times 10 to the power of negative 3 end exponent space straight m cubed end cell row cell P subscript A end cell equals cell 8 cross times 10 to the power of 4 space straight N divided by straight m to the power of 4 end cell row cell P subscript B end cell equals cell straight P subscript straight A equals 8 cross times 10 to the power of 4 space straight N divided by straight m to the power of 4 end cell row cell P subscript C end cell equals cell 6 cross times 10 to the power of 4 space straight N divided by straight m squared end cell row cell T subscript A end cell equals cell 120 plus 273 equals 393 space straight K end cell end table end style 

Ditanya :  W ?

Jawab :
Proses AB : Isobarik

begin mathsize 14px style W subscript A B end subscript equals P subscript A left parenthesis V subscript B minus V subscript A right parenthesis W subscript A B end subscript equals 8 cross times 10 to the power of 4 left parenthesis 4 comma 8 cross times 10 to the power of negative 3 end exponent minus 4 cross times 10 to the power of negative 3 end exponent right parenthesis W subscript A B end subscript equals 64 space straight J end style 

Proses BC: Isokhorik

begin mathsize 14px style W subscript B C end subscript equals 0 space straight J end style 

Kerja total :

begin mathsize 14px style W equals W subscript A B end subscript plus W subscript B C end subscript W equals 64 plus 0 W equals 64 space straight J end style 

Jadi,kerja total 64 J.

Pembahasan terverifikasi oleh Roboguru

Terakhir diupdate 13 Maret 2021

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