Page 28 - MODUL KIMIA A+XPLOSIVE SPM (LATEST)

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SPM Chemistry A xplosive Module (Chemistry A Ticket For “U”) RED ZONE [RZ]

A Ethanoic acid and sodium hydroxide solution
Asid etanoik dan larutan natrium hidroksida
B Ethanoic acid and ammonia solution
Asid etanoik dan larutan ammonia
C Nitric acid and potassium hydroxide solution
Asid nitrik dan larutan kalium hidroksida
D Nitric acid and ammonia solution
Asid nitrik dan larutan ammonia

44 Which of the following is true of an exothermic reaction?
Antara berikut manakah benar tentang tindak balas eksotermik?

A The temperature of the mixture decreases.
Suhu campuran tindak balas menurun.
B The container becomes hotter.
Bekas itu menjadi panas.
C Heat energy is absorbed from the surroundings.
Tenaga haba diserap dari persekitaran.
D The heat energy is converted to kinetic energy.
Tenaga haba ditukar kepada tenaga kinetik.

-3
3
3
45 25 cm of 1.0 mol dm potassium hydroxide solution is reacted with 25 cm of
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1.0 mol dm hydrochloric acid solution.
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3
-3
25 cm larutan kalium hidroksida, 1.0 mol dm ditindakbalaskan dengan 25 cm larutan
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asid hidroklorik, 1.0 mol dm .

0
Average initial temperature reading/ Purata suhu awal = 30.0 C
0
Highest temperature reading/ Suhu tertinggi campuran = 36.5 C

What is the heat of neutralization for the reaction?
-1
-3
[Specific heat capacity of solution = 4.2 J g -1 0 C , density of solution = 1 g cm ]
Berapakah haba peneutralan untuk tindak balas itu?
-3
-1
[Muatan haba tentu larutan = 4.2 J g -1 0 C , ketumpatan larutan = 1 g cm ]

-1
-1
A –27.3 kJ mol C –54.6 kJ mol
-1
-1
B +27.3 kJ mol D +54.6 kJ mol

46 Carbon burns in oxygen in a reaction as shown in the equation below.
Karbon terbakar dalam oksigen seperti ditunjukkan dalam persamaan dibawah.

-1
C(s) + O 2(g) CO 2 (g) ΔH = -394 kJ mol

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