Pertanyaan

20 Liter campuran gas etena C 2 H 4 dan O 2 pada temperatur 27 ∘ C dan tekanan = 1,476 atm, beratnya = 36,8 gram. a. Hitunglah susunan campuran gas tersebut dinyatakan dengan berat %!

20 Liter campuran gas etena $C_{2} H_{4}$ dan $O_{2}$ pada temperatur $27^{\circ} C$ dan tekanan = 1,476 atm, beratnya = 36,8 gram.

a. Hitunglah susunan campuran gas tersebut dinyatakan dengan berat %!

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N. Agnia

Master Teacher

Mahasiswa/Alumni Institut Pertanian Bogor

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ada gas etena sebanyak 26,09% dan gas oksigen sebanyak 74,53%.

ada gas etena sebanyak 26,09% dan gas oksigen sebanyak 74,53%. $\;\;\;$

Pembahasan

Mencari mol total campuran gas etena dan gas oksigen menggunakan persamaan gas ideal. Persamaan reaksinya setaranya adalah: Jadi, ada gas etena sebanyak 26,09% dan gas oksigen sebanyak 74,53%.

Mencari mol total campuran gas etena dan gas oksigen menggunakan persamaan gas ideal.

$space space space space space space space space space space space space space space space space space space space space P space x space V space equals space n space x space R space x space T space 1.476 space atm space x space 20 space L space equals space n subscript total space x space 0 comma 082 space L space atm forward slash mol space K space x space 300 space K space space space space space space space space space space space space space space space space space space space space space n subscript total space equals space fraction numerator 29 comma 52 space over denominator 24 comma 6 end fraction mol space space space space space space space space space space space space space space space space space space space space space n subscript total space equals space 1 comma 2 space mol$

Persamaan reaksinya setaranya adalah:

C subscript 2 H subscript 4 space plus space 5 over 2 O subscript 2 space rightwards arrow space 2 C O subscript 2 space plus space 2 H subscript 2 O space left parenthesis x 2 right parenthesis 2 C subscript 2 H subscript 4 space plus space 5 O subscript 2 space rightwards arrow space 4 C O subscript 2 space plus space 4 H subscript 2 O

$mol space C subscript 2 H subscript 4 space equals space fraction numerator koefisien space C subscript 2 H subscript 4 over denominator koefisienC subscript 2 H subscript 4 and koefisien space O subscript 2 end fraction space x space 1 comma 2 space mol mol space C subscript 2 H subscript 4 space end subscript equals space 2 over 7 space x space 1 comma 2 space mol mol space C subscript 2 H subscript 4 space equals space 0 comma 3429 space mol massa space C subscript 2 H subscript 4 space equals space 0 comma 3429 space mol space x space 28 space gram forward slash mol massa space C subscript 2 H subscript 4 space equals space 9 comma 6012 space gram Persen space massa space C subscript 2 H subscript 4 space equals space fraction numerator 9 comma 6012 space gram over denominator 36 comma 8 space gram end fraction space x space 100 space percent sign Persen space massa space C subscript 2 H subscript 4 space equals space 26 comma 09 space percent sign$

$mol space O subscript 2 space end subscript equals space fraction numerator koefisien space O subscript 2 space end subscript over denominator koefisienC subscript 2 H subscript 4 and koefisien space O subscript 2 end fraction space x space 1 comma 2 space mol mol space O subscript 2 space end subscript space equals space 5 over 7 space x space 1 comma 2 space mol mol space O subscript 2 space end subscript space equals space 0 comma 8571 space space mol massa space O subscript 2 space end subscript space equals space 0 comma 8571 space mol space x space 28 space gram forward slash mol massa space O subscript 2 space end subscript space equals space 27 comma 4272 space gram Persen space massa space O subscript 2 space end subscript space equals space fraction numerator 27 comma 4272 space gram over denominator 36 comma 8 space gram end fraction space x space 100 space percent sign Persen space massa space O subscript 2 space end subscript space equals space 74 comma 53 space percent sign$

Jadi, ada gas etena sebanyak 26,09% dan gas oksigen sebanyak 74,53%. $\;\;\;$

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