Thermal Properties & Temperature
1. This question has 4 part(s).
1.1. Extended
A group of students were given the equipment shown in Fig. 1.1 and were asked to identify an unknown clear liquid by its specific heat capacity.
The students were provided with the unknown substance, an electric water bath, and were allowed to use water from the tap.
Suggest why the students were given an electric water bath rather than a Bunsen burner.
1.2. Extended
List the quantities that the students must measure to determine the specific heat capacity of the unknown liquid.
1.3. Extended
The students are given Table 1.2 to help with their investigation.
Substance | Specific heat capacity (J/kg °C) |
water | 4190 |
ethanol | 2460 |
salt water | 3930 |
acetic acid | 2180 |
glycerine | 2430 |
Table 1.2
Suggest a method for measuring the energy transferred from the water bath to the unknown substance.
1.4. Extended
The student recorded the following measurements.
Initial temperature of unknown substance = 22°C
Final temperature of unknown substance = 34°C
Mass of unknown substance = 0.41 kg
Energy transferred = 11 070 J
(i) Identify the unknown substance.
[4]
(ii) Suggest a reason why the value calculated is different to the value given in the table.
[1]
Ai এর মাধ্যমে
১০ লক্ষ+ প্রশ্ন ডাটাবেজ
প্র্যাকটিস এর মাধ্যমে নিজেকে তৈরি করে ফেলো
উত্তর দিবে তোমার বই থেকে ও তোমার মত করে।
সারা দেশের শিক্ষার্থীদের মধ্যে নিজের অবস্থান যাচাই
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