Page 154 - SITI KHAIRUL ATIKAH E-PORTFOLIO GB200084 (microteaching)
P. 154
(a) Based on the graph in Diagram 3, what is the boiling point of the substance?
Berdasarkan graf pada Rajah 3, apakah takat didih bagi bahan itu?
218°C
[1 mark]
[1 markah]
(b) State the change of temperature of the substance during the melting process.
Nyatakan perubahan suhu bagi bahan itu semasa proses peleburan.
Suhu tidak berubah
[1 mark]
[1 markah]
(c) Calculate the heat energy needed for melting process of the substance.
Hitungkan tenaga haba yang diperlukan untuk proses peleburan bagi bahan itu.
Q=ml
Pt = 100 x 2.6 x 60 = 15600 J
[2 marks]
[2 markah]
(d) Calculate the specific latent heat of fusion of the substance.
Hitungkan haba pendam tentu pelakuran bahan itu.
Q=ml
15600 = 0.05! marks]
(2 markah)
| = 15600 J/0.05 kg = 312000 Jkg"
