
Termokimia
Authored by mariani surtiningsih
Chemistry
11th Grade
Used 22+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Berikut ini beberapa peristiwa dalam kehidupan sehari-hari:
(1) hujan yang terbentuk dari uap air
(2) es mencair
(3) fotosintesis
(4) air membeku
(5) batu kapur dilarutkan ke dalam air
Pasangan peristiwa yang menunjukan reaksi endoterm adalah….
(1) dan (2)
(1) dan (4)
(2) dan (3)
(3) dan (4)
(3) dan (5)
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Larutan asam klorida bereaksi dengan natrium hidroksida di dalam sebuah tabung reaksi kemudian dasar tabung terasa panas. Reaksi ini dapat digolongkan….
eksoterm, energi berpindah dari lingkungan ke sistem
eksoterm, energi berpindah dari sistem ke lingkungan
endoterm, energi berpindah dari sistem ke lingkungan
endoterm, energi tidak berpindah
endoterm, energi berpindah dari lingkungan ke sistem
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Berdasarkan digram diatas, reaksi tersebut termasuk reaksi ...
eksoterm, karena H1 < H2
endoterm karena H1 < H2
. eksoterm karena H1 > H2
endoterm karena melepas kalor
endoterm ΔH > 0
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Yang terjadi pada reaksi eksoterm adalah....
entalpi akhir > entalpi awal
ΔH bertanda positif
sistem menyerap kalor
panas mengalir dari lingkungan ke sistem
entalpi sistem berkurang
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Reaksi pembentukan air pada keadaan standar ditunjukkan dengan persamaan termokimia sebagai berikut :
H2(g) + ½ O2 (g) → H2O (l) ΔH = -290 kJ
Apabila reaksi membutuhkan 32 gram oksigen, kalor yang dihasilkan sebanyak . . . kJ.(Ar O =16)
- 718
- 580
- 143
+ 287
+ 718
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Berdasarkan definisinya yang disebut entalpi penguraian adalah ∆H dari reaksi….
A. NH3 + HCl → NH4Cl
PCl3 + Cl2 → PCl5
½ I2 + ½ H2 → HI
A. SO3 → S +3/2 O2
Ag+ + Cl- → AgCl
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Perubahan entalpi dari reaksi manakah yang dapat disebut sebagai perubahan entalpi pembentukan ΔHf° Na2SO4 kristal….
2NaOH(aq) + H2S04(aq) → Na2SO4(aq) +2 H2O(l)
2NaOH(s) + H2S04(aq) → Na2SO4(s) + 2H2O(l)
Na2O(s) +SO2(g) → Na2SO4(s)
2Na(s) +1/8 S8(s)+ 2O2(g) → Na2SO4(s)
16Na(s) + S8(s) + 16O2(g) → 8Na2SO4
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