1. hasil pengamataneprints.undip.ac.id/76797/13/16._lampiran.pdf1.3 tabel 11. hasil pengamatan cake...

30

LAMPIRAN

1. Hasil Pengamatan

1.1 Tabel 9. Hasil Pengamatan Densitas dan Viskositas

Variabel Pengamatan

Berat

Kopi

(gr)

Volume air

( L)

Waktu

Filtrasi

(menit)

Filtrat ke Densitas

(gr/ml)

Viskositas

(cp)

500 40 50 1 1,048 1,310

2 1,047 1,288

3 1,045 1,244

4 1,044 1,211

5 1,042 1,073

1000 40 50 1 1,089 1,503

2 1,083 1,354

3 1,088 1,479

4 1,082 1,277

5 1,082 1,215

1.2 Tabel 10. Hasil Volume Filtrat

Variabel Pengamatan Valve pengambilan filtrate

Waktu

(menit) Air

Massa

(gr)

Waktu

(menit) I II III IV V

50 40 L 500 gr 10 2050 1700 1600 1325 1230

20 2700 2450 2300 2075 2000

30 3575 3400 3250 2900 2500

40 4100 3550 3420 3250 2750

50 4450 4200 4000 3550 3150

50 40 L 1000 gr 10 1400 1230 1190 1150 700

20 1950 2000 1575 1500 815

30 2475 2550 2260 2135 1075

40 2900 2800 2420 2300 1200

50 3350 3250 2900 2650 1400

31

1.3 Tabel 11. Hasil Pengamatan Cake Basah dan Cake Kering

Variabel Pengamatan

Variabel Lama Pengovenan

(jam)

Plate ke Cake

Basah (gr)

Cake

Kering

(gr)

500 gr 2 1 185,900 143,230

2 77,540 52,700

3 39,470 20,560

4 23,710 9,470

1000 gr 2 1 219,600 128,650

2 173,600 93,320

3 157,850 87,170

4 153,480 85,310

2. Perhitungan

2.1 Densitas Variabel 1 (500 gr)

Rumus densitas :

𝜌 = 𝑚𝑎𝑠𝑠𝑎 𝑝𝑖𝑘𝑛𝑜𝑚𝑒𝑡𝑒𝑟 𝑖𝑠𝑖 − 𝑚𝑎𝑠𝑠𝑎 𝑝𝑖𝑘𝑛𝑜𝑚𝑒𝑡𝑒𝑟 𝑘𝑜𝑠𝑜𝑛𝑔

𝑣𝑜𝑙𝑢𝑚𝑒 𝑝𝑖𝑘𝑛𝑜𝑚𝑒𝑡𝑒𝑟

Filtrat 1

𝜌 ml

gr

25

)04.2723,53(

= 1,048 gr/ml

Filtrat 2

𝜌 ml

gr

25

)04.2722,53(

= 1,047 gr/ml

Filtrat 3

𝜌 ml

gr

25

)04.2717,53(

= 1,045 gr/ml

Filtrat 4

𝜌 ml

gr

25

)04.2713,53(

= 1,044 gr/ml

32

Filtrat 5

𝜌 ml

gr

25

)04.2709,53(

= 1,042 gr/ml

2.2 Viskositas Variabel 1 (500 gr)

Rumus Viskositas :

µ = 𝑡𝑥 × ρx

𝑡0 × ρ0 × μ0

Filtrat 1

µ =

1,25 𝑠 × 1,048 gr/ml

1 𝑠 × 1 gr/ml × 1 cp

= 1,310 cp

Filtrat 2

µ =

1,23 𝑠 × 1,047 gr/ml

1 𝑠 × 1 gr/ml × 1 cp

= 1,288 cp

Filtrat 3

µ =

1,19 𝑠 × 1,045 gr/ml

1 𝑠 × 1 gr/ml × 1 cp

= 1,244 cp

Filtrat 4

µ =

1,16 𝑠 × 1,044 gr/ml

1 𝑠 × 1 gr/ml × 1 cp

= 1,211 cp

Filtrat 5

µ = 1,03 𝑠 × 1,042 gr/ml

1 𝑠 × 1 gr/ml × 1 cp

= 1,073 cp

2.3 Massa Cake Basah, Cake Kering dan % Kadar Air yang Menguap Variabel 1

2.3.1 Cake Basah

𝐵𝑒𝑟𝑎𝑡 𝐵𝑎𝑠𝑎ℎ = 𝐶𝑎𝑘𝑒 𝐵𝑎𝑠𝑎ℎ − 𝐵𝑒𝑟𝑎𝑡 𝑐𝑎𝑤𝑎𝑛 𝑝𝑜𝑟𝑠𝑒𝑙𝑖𝑛 𝑘𝑜𝑠𝑜𝑛𝑔

33

Plate 1

Cake basah = (224.67-38.77) gr

= 185,900 gr

Plate 2

Cake basah = (128.69-51.15) gr

= 77,540 gr

Plate 3

Cake basah = (84.25-44.78) gr

= 39,470 gr

Plate 4

Cake basah = (67.36-43.65) gr

= 23,710 gr

2.3.2 Cake Kering

𝐵𝑒𝑟𝑎𝑡 𝑘𝑒𝑟𝑖𝑛𝑔 = 𝐶𝑎𝑘𝑒 𝑘𝑒𝑟𝑖𝑛𝑔 − 𝐵𝑒𝑟𝑎𝑡 𝑐𝑎𝑤𝑎𝑛 𝑝𝑜𝑟𝑠𝑒𝑙𝑖𝑛 𝑘𝑜𝑠𝑜𝑛𝑔

Plate 1

Cake kering = (182-38.77) gr

= 143,230 gr

Plate 2

Cake kering = (103.85-51.15) gr

= 52,700 gr

Plate 3

Cake kering = (65.34-44.78) gr

= 20,560 gr

Plate 4

Cake kering = (53.12-43.65) gr

= 9,470 gr

2.4 Densitas Variabel 2 (1000 gr)

Rumus densitas :

𝜌 = 𝑚𝑎𝑠𝑠𝑎 𝑝𝑖𝑘𝑛𝑜𝑚𝑒𝑡𝑒𝑟 𝑖𝑠𝑖 − 𝑚𝑎𝑠𝑠𝑎 𝑝𝑖𝑘𝑛𝑜𝑚𝑒𝑡𝑒𝑟 𝑘𝑜𝑠𝑜𝑛𝑔

𝑣𝑜𝑙𝑢𝑚𝑒 𝑝𝑖𝑘𝑛𝑜𝑚𝑒𝑡𝑒𝑟

Filtrat 1

𝜌 ml

gr

25

)04.2726,54(

= 1,089 gr/ml

Filtrat 2

𝜌 ml

gr

25

)04.2712,54(

= 1,083 gr/ml

34

Filtrat 3

𝜌 ml

gr

25

)04.2723,54(

= 1,088 gr/ml

Filtrat 4

𝜌 ml

gr

25

)04.2709,54(

= 1,082 gr/ml

Filtrat 5

𝜌 ml

gr

25

)04.2717,54(

= 1,085 gr/ml

2.5 Viskositas Variabel 2 (1000 gr)

Rumus Viskositas :

µ = 𝑡𝑥 × ρx

𝑡0 × ρ0 × μ0

Filtrat 1

µ =

1,38 𝑠 × 1,089 gr/ml

1 𝑠 × 1 gr/ml × 1 cp

= 1,503 cp

Filtrat 2

µ =

1,25 𝑠 × 1,083 gr/ml

1 𝑠 × 1 gr/ml × 1 cp

= 1,354 cp

Filtrat 3

µ =

1,36 𝑠 × 1,088 gr/ml

1 𝑠 × 1 gr/ml × 1 cp

= 1,479 cp

35

Filtrat 4

µ =

1,18 𝑠 × 1,082 gr/ml

1 𝑠 × 1 gr/ml × 1 cp

= 1,277 cp

Filtrat 5

µ = 1,12 𝑠 × 1,085 gr/ml

1 𝑠 × 1 gr/ml × 1 cp

= 1,215 cp

2.6 Massa Cake Basah, Cake Kering dan % Kadar Air yang Menguap Variabel 2

2.6.1 Cake Basah

𝐵𝑒𝑟𝑎𝑡 𝐵𝑎𝑠𝑎ℎ = 𝐶𝑎𝑘𝑒 𝐵𝑎𝑠𝑎ℎ − 𝐵𝑒𝑟𝑎𝑡 𝑐𝑎𝑤𝑎𝑛 𝑝𝑜𝑟𝑠𝑒𝑙𝑖𝑛 𝑘𝑜𝑠𝑜𝑛𝑔

Plate 1

Cake basah = (258.67-39.07) gr

= 219,600 gr

Plate 2

Cake basah = (217.23-43.63) gr

= 173,600 gr

Plate 3

Cake basah = (201.68-43.83) gr

= 157,850 gr

Plate 4

Cake basah = (202.35-48.87) gr

= 153,480 gr

2.6.2 Cake Kering

𝐵𝑒𝑟𝑎𝑡 𝑘𝑒𝑟𝑖𝑛𝑔 = 𝐶𝑎𝑘𝑒 𝑘𝑒𝑟𝑖𝑛𝑔 − 𝐵𝑒𝑟𝑎𝑡 𝑐𝑎𝑤𝑎𝑛 𝑝𝑜𝑟𝑠𝑒𝑙𝑖𝑛 𝑘𝑜𝑠𝑜𝑛𝑔

Plate 1

Cake kering = (167.72-39.07) gr

= 128,650 gr

Plate 2

Cake kering = (136.95-43.63) gr

= 93,320 gr

Plate 3

Cake kering = (127-39.83) gr

= 87,170 gr

Plate 4

Cake kering = (134.18-48.87) gr

= 85,310 gr

36

3. Lampiran Foto Hasil Percobaan

Alat Filtrasi Menghitung Viskositas Menghitung Densitas

Pengovenan cake selama 2 jam Proses desikator

Kopi dieng

37

3.1 Variabel 1 (500 gr)

Menit ke 10

Filtrat 1,2,3,4,5

Menit ke 20

Filtrat 1,2,3,4,5

Menit ke 30

Filtrat 1,2,3,4,5

Menit ke 40

Filtrat 1,2,3,4,5

38

Menit ke 50

Filtrat 1,2,3,4,5

Cake basah

Plate 1,2,3,4

3.2 Variabel 2 (1000 gr)

Menit ke 10

Filtrat 1,2,3,4,5

Menit ke 20

Filtrat 1,2,3,4,5

39

Menit ke 30

Filtrat 1,2,3,4,5

Menit ke 40

Filtrat 1,2,3,4,5

Menit ke 50

Filtrat 1,2,3,4,5

Cake basah

Plate 1,2,3,4