Page 290 - MODUL SPEKTRUM FIZIK SPM

Paper 3 / Kertas 3
Section A / Bahagian A
[28 marks / 28 markah]

Answer all questions in this section.
Jawab semua soalan dalam bahagian ini.

1. A student carries out an experiment to investigate the relationship between the absolute temperature, T
and the length of air trapped, h at a constant air pressure. The set up of the apparatus is shown in
Diagram 1.1.
Seorang murid menjalankan satu eksperimen untuk menyiasat hubungan antara suhu mutlak, T
dengan panjang udara terperangkap, h pada tekanan udara yang malar. Susunan radas ditunjukkan
dalam Rajah 1.1.

Diagram 1.1 / Rajah 1.1

A drop of concentrated sulphuric acid is inserted into the capillary tube so that some air is trapped
inside. The capillary tube is then tied onto a metre rule so that the lower end of the trapped air is
placed at the zero reading of the metre rule. A little ice is added into a beaker of water until the whole
part of the trapped air is immersed in the water. Water is heated slowly while being stirred
continuously until the temperature rises to 20.0 C. The length of the trapped air, h, is measured. The
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experiment is repeated at temperatures 40.0 C, 60.0 C, 80.0 C and 100.0 C. The corresponding
readings of h are shown in Diagrams 1.2, 1.3, 1.4, 1.5 and 1.6 on page 290 and 291.
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