Page 236 - MODUL KIMIA A+XPLOSIVE SPM (LATEST)

P2 - Ratio of mole between Cu and CuSO 4
Bilangan mol di antara Cu dan CuSO 4
= 1 : 1
= 0.05 : 0.05

P3 - Heat change / Perubahan haba
= 100 x 4.2 x (57.5 – 28.5)
= 12180 J
= 12.18 kJ
P4 - Heat of displacement / Haba penyesaran
= 12.18 / 0.05 4
-1
= – 243.6 kJ mol

(iii) Concentration / Kepekatan
= 0.05 x 1000 / 100 1
-3
= 0.5 mol dm

o
(b)(i) P1 - T 1 is higher than 29.0 C.
o
T 1 lebih tinggi daripada 29.0 C.
P2 - Zinc is more electropositive than iron.
Zink lebih elektropositif daripada ferum.
P3 - More heat energy is produced at the end of the reaction.
Lebih banyak tenaga haba dihasilkan pada akhir tindak balas.
o
P4 - T 2 remains as 29.0 C.
o
T 2 masih kekal pada 29.0 C.
P5 - Silver is less electropositive than copper.
Argentum kurang elektropositif daripada kuprum.
P6 - Silver cannot displace copper from copper(II) sulphate solution.
Argentum tidak dapat menyesarkan kuprum daripada larutan 6
kuprum(II) sulfat.

(ii) P1 - Magnesium / magnesium
P2 - Blue copper(II) sulphate solution turns lighter blue / colourless.
Larutan kuprum(II) sulfat bertukar dari biru ke biru muda / tak
berwarna.
P3 - Final thermometer reading is higher than initial thermometer
reading.
Bacaan termometer akhir lebih tinggi daripada bacaan
termometer awal.
P4 - Brown solid is formed. 4
Pepejal perang terbentuk.

TOTAL / JUMLAH 20

Sektor Pembelajaran, Jabatan Pendidikan Negeri Sabah | 2020 235