
TERMOKIMIA(MENENTUKAN NILAI ENTALPI REAKSI)
Authored by Mardana Nengah
Chemistry
Professional Development
10 Questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
(1) dan (2)
(1) dan (3)
(2) dan (3)
(2) dan (4)
(4) dan (5)
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Apabila 100 mL larutan NaOH 1 M direaksikan dengan 100 mL Larutan HCl 1 M dalam sebuah kalorimeter, ternyata suhu larutan naik dari 29 oC menjadi 37,5oC. Jika kalor jenis larutan dianggap sama dengan kalor jenis air = 4,2 J/groC dan massa jenis air sama dengan massa jenis larutan = 1 gr/mL, maka perubahan entalpi reaksi :
-7,14 kJ/mol
- 45,6 kJ/mol
-71,4 kJ/mol
A. -77,7 kJ/mol
A. -83,3 kJ/mol
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Diketahui ∆H of H2O (l) = - 258 kJ/mol
∆H of CO2 (g) = - 393 kJ/mol
∆H of C2H2 (g) = + 227 kJ/mol
Jumlah kalor yang dibebaskan pada pembakaran 0,52 gram C2H2 ( Mr =26 ) adalah….
25,42 kJ
47,06 kJ
67,49 kJ
90.50 kJ
129,80 kJ
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Perhatikan diagram diatas :
+ 790,4 kj
+ 593,8 kj
+ 196,6 kj
– 593,8 kj
– 196,6 kj
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Diketahui energi ikatan rata rata sebagai berikut :
Besarnya ∆H reaksi adisi etena(CH2=CH2) dengan HCl adalah….
-175 kJ/mol
- 44 kJ/mol
+44 kJ/mol
+175 kJ/mol
+475 kJ/mol
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Jika diketahui ∆Hoc CH3OH (g) = - 638 kJ /mol, maka jumlah kalor yang dihasilkan pada pembakaran sempurna 48 gr Metanol (CH3OH) adalah…(Ar C =12, O = 16 dan H = 1)
159 kJ
319 kJ
638 kJ
957 kJ
1276 kJ
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Perhatikan diagram ∆H berikut ini.
+99 kj
-99 kj
-297 kj
+495 kj
-495 kj
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