Calculate the volume occupied by 1.50 × 10 23 molecules of chlorine gas at S T P .

We know that, 1 mole of Cl 2 = 22 . 4 Liters at STP = 6 . 022 × 10 23 6 . 022 × 10 23 molecules have 22.4 Liters volume of STP Therefore, 1 . 50 × 10 23 molecules will have volume = 1 . 50 × 10 23 × 22 . 4 6 . 022 × 10 23 = 5 . 576 Litres at STP

Name the physical quantity which is measured in calories. How is calorie related to the SI unit of that quantity?

A calorie is used to measure heat energy. The amount of heat energy required to raise the temperature of a quantity of water through 1 ° C . SI unit of energy is joule J . The relation between calorie and heat energy is 1 calorie = 4 . 186 J or 4 . 2 J

EASY

10th Tamil Nadu Board

IMPORTANT

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What is co-efficient of real expansion?

Important Questions on Thermal Physics

EASY

10th Tamil Nadu Board

IMPORTANT

Science Crash Course (Based on Revised Syllabus-2023)>Chapter 3 - Thermal Physics>Exercise>Q 39

What is co-efficient of apparent expansion?

EASY

10th Tamil Nadu Board

IMPORTANT

Science Crash Course (Based on Revised Syllabus-2023)>Chapter 3 - Thermal Physics>Exercise>Q 40

Explain the experiment of measuring the real and apparent expansion of a liquid with a neat diagram.

MEDIUM

10th Tamil Nadu Board

IMPORTANT

Science Crash Course (Based on Revised Syllabus-2023)>Chapter 3 - Thermal Physics>Exercise>Q 41

Two ideal gas thermometers A and B use oxygen and hydrogen, respectively. The following observations are made:

Temperature	Pressure thermometer A	Pressure thermometer B
Triple-point of water	$1 .250 \times 10^{5} Pa$	$0 .200 \times 10^{5} Pa$
Normal melting point of sulphur	$1 .797 \times 10^{5} Pa$	$0 .287 \times 10^{5} Pa$

What is the absolute temperature of the normal melting point of sulphur as read by thermometers A and B? What do you think is the reason behind the slight difference in answers of thermometers A and B ? (The thermometers are not faulty). What further procedure is needed in the experiment to reduce the discrepancy between the two readings ?

EASY

10th Tamil Nadu Board

IMPORTANT

Science Crash Course (Based on Revised Syllabus-2023)>Chapter 3 - Thermal Physics>Exercise>Q 42

How much time would it take to distribute one Avogadro number of wheat grains, if

1 0^{10}

grains are distributed each second ?

EASY

10th Tamil Nadu Board

IMPORTANT

Science Crash Course (Based on Revised Syllabus-2023)>Chapter 3 - Thermal Physics>Exercise>Q 43

Will the volume of one mole of chlorine gas at STP be the same or different from the volume of one mole of sulphur dioxide gas at STP?

MEDIUM

10th Tamil Nadu Board

IMPORTANT

Science Crash Course (Based on Revised Syllabus-2023)>Chapter 3 - Thermal Physics>Exercise>Q 44

Calculate the volume occupied by

1.50 \times 10^{23}

molecules of chlorine gas at

S T P

HARD

10th Tamil Nadu Board

IMPORTANT

Science Crash Course (Based on Revised Syllabus-2023)>Chapter 3 - Thermal Physics>Exercise>Q 45

A vessel contains N molecules of chlorine gas at a certain temperature and pressure. How many molecules of sulphur dioxide gas will the vessel contain at the same temperature and pressure?

HARD

10th Tamil Nadu Board

IMPORTANT

Science Crash Course (Based on Revised Syllabus-2023)>Chapter 3 - Thermal Physics>Exercise>Q 46

A flask

X

contains

2.0 g

of oxygen gas at a certain temperature and pressure. Another flask

Y

contains

2.0 g

of hydrogen gas at the same temperature and pressure. Which sample contains a greater number of molecules?

What is co-efficient of real expansion?

Important Questions on Thermal Physics

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