The graph shows the relationship between volume and temperature for an ideal gas - Edexcel - GCSE Physics - Question 5 - 2017 - Paper 1
Question 5
The graph shows the relationship between volume and temperature for an ideal gas.
(a) (i) Estimate the volume of the gas at 0°C.
(ii) State the value of –273°C in ... show full transcript
Worked Solution & Example Answer:The graph shows the relationship between volume and temperature for an ideal gas - Edexcel - GCSE Physics - Question 5 - 2017 - Paper 1
Step 1
(i) Estimate the volume of the gas at 0°C.
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Answer
To estimate the volume of the gas at 0°C, observe the graph at this temperature. The volume corresponds to approximately 300 cm³. Therefore, the estimated volume of the gas at 0°C is 300 cm³.
Step 2
(ii) State the value of –273°C in kelvin.
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Answer
To convert the temperature from Celsius to Kelvin, use the formula:
K=°C+273
Substituting –273°C gives:
K=−273+273=0K
Hence, the value of –273°C in Kelvin is 0 K.
Step 3
(iii) Suggest what would happen to a real gas when it is cooled to a very low temperature.
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When a real gas is cooled to a very low temperature, it may deviate from ideal gas behavior. The kinetic energy of the gas particles decreases significantly, leading to reduced pressure and volume. Eventually, the gas may condense into a liquid or solid state as intermolecular forces become significant enough to affect particle behavior.
