Physics for the IB Diploma 6th Edition>Chapter 3 - Thermal Physics>Test yourself>Q 28

MEDIUM

Diploma

IMPORTANT

Earn 100

The molar mass of helium is $4.00 g / mol$ . Calculate the volume of $1.0 mol$ of helium at standard temperature and pressure (STP) i.e., at $T = 273 K, P = 1.0 \times 10^{5} Pa$

b. Determine the density of helium at STP.

Important Questions on Thermal Physics

MEDIUM

Diploma

IMPORTANT

Physics for the IB Diploma 6th Edition>Chapter 3 - Thermal Physics>Test yourself>Q 28

The molar mass of the helium is $4.0 g / mol$ . Calculate the volume of $1.0 mol$ of helium at standard temperature and pressure (STP) i.e., at $T = 273 K, P = 1.0 \times 10^{5} Pa$

c. Estimate the density of oxygen gas at STP ( molar mass of oxygen gas is $32 g / mol$ )

MEDIUM

Diploma

IMPORTANT

Physics for the IB Diploma 6th Edition>Chapter 3 - Thermal Physics>Test yourself>Q 29

The density of an ideal gas is

1.35 kg / m^{3}

. The temperature in Kelvin and the pressure are both doubled. Calculate the new density of the gas.

MEDIUM

Diploma

IMPORTANT

Physics for the IB Diploma 6th Edition>Chapter 3 - Thermal Physics>Test yourself>Q 30

Calculate the average speed (r.m.s) of helium atoms at a temperature of

850 K

. The molar mass of helium is

4.0 g {mol}^{- 1}

.

HARD

Diploma

IMPORTANT

Physics for the IB Diploma 6th Edition>Chapter 3 - Thermal Physics>Test yourself>Q 31

Show that the average (r.m.s) speed of molecules of gas of molar mass

M

(in kg {mol}^{- 1})

kept at a temperature

T

is given by

c = \sqrt{\frac{3 R T}{M}}

.

EASY

Diploma

IMPORTANT

Physics for the IB Diploma 6th Edition>Chapter 3 - Thermal Physics>Test yourself>Q 32

Calculate the average random kinetic energy of a gas kept at a temperature of

300 K

.

MEDIUM

Diploma

IMPORTANT

Physics for the IB Diploma 6th Edition>Chapter 3 - Thermal Physics>Test yourself>Q 32

Determine the ratio of the average speeds (r.m.s. speed) of ideal gases of molar mass

4.0 g {mol}^{- 1} and 32 g {mol}^{- 1}

, which are kept at the same temperature.

MEDIUM

Diploma

IMPORTANT

Physics for the IB Diploma 6th Edition>Chapter 3 - Thermal Physics>Exam-style questions>Q 1

Body

X

whose temperature is

0^{o} C

is brought into thermal contact with body

Y

of equal mass and temperature

100^{o} C

. The only exchange of heat that takes place are between

X

and

Y

. The specific heat capacity of

X

is greater than that of

Y

. Which statement about the final equilibrium temperature

T (i n^{o} C)

of the two bodies is correct?

MEDIUM

Diploma

IMPORTANT

Physics for the IB Diploma 6th Edition>Chapter 3 - Thermal Physics>Exam-style questions>Q 2

Energy is provided to a liquid at its boiling point at a rate of

P

joules per second. The rate at which mass is boiling away is

μ

kg per second. What is the specific latent heat of vaporisation of the liquid?