SPM Chemistry 2017 (Q6)

Question

6 . (a) Table 2 shows the value of heat of neutralisation for the reaction between two different acids with sodium hydroxide solution.

Jadual 2 menunjukkan nilai haba peneutralan bagi tindak balas antara dua asid berbeza dengan larutan natrium hidroksida.

(i) What is the meaning of heat of neutralisation?

Apakah maksud bagi haba peneutralan?

(ii) Based on Table 2, suggest acid HX.

Berdasarkan Jadual 2, cadangkan asid Hx.

(iii) Explain why there are difference in the value of heat of neutralisation.

Terangkan mengapa terdapat perbezaan nilai bagi haba peneutralan.

 

(b) A student carried out an experiment to determine the heat of combustion of ethanol. He found that 0.575g of ethanol is used to increase the temperature of 100 of water from . Calculate:

Seorang murid menjalankan satu eksperimen untuk menentukan haba pembakaran etanol. Dia mendapati 0.575g etanol digunakan untuk meningkatkan suhu bagi 100air daripada . Hitung:

(i) The heat released from the combustion of ethanol.

Haba yang dibebaskan dari pembakaran ethanol.

(ii) Number of mole of ethanol used.

[Molar mass of ethanol 46]

Bilangan mol etanol yang digunakan.

[ Jisin molar bagi etanol 46]

(iii) Heat of combustion of ethanol.

Haba pembakaran etanol.

(iv) Draw the apparatus set-up to carry out the experiment to investigate the heat of combustion of ethanol.
Lukis susunan radas untuk menjalakan eksperimen bagi menyiasat haba pembakaran etanol.

Cher Questions Solution Bank Rumusan Jawapan SPM & IGCSE Questions Answers Solution

Cher Questions Solution Bank Rumusan Jawapan SPM & IGCSE Questions Answers Solution

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