Define molar specific heat. Write its units. - Vidyadip

Question

Define molar specific heat. Write its units.

✓

Answer

Molar specific heat is defined as the amount of heat required to raise the temperature of one mole of a gas through 1K at constant volume or at constant pressure. If the volume is constant, it is called the molar specific heat at constant volume. Similarly, if the pressure is constant, it is called the molar specific heat at constant pressure. It is expressed in $\mathrm{J} \mathrm{~mol}^{-1} \mathrm{~K}^{-1}$ or $\mathrm{J} \mathrm{~mol}^{-1\circ} \mathrm{C}^{-1}$.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "3 Marks Question" from Thermodynamics→Thermodynamics — all question types→Physics STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

A trolley of mass $20kg$ rests on a horizontal surface. A massless string tied to the trolley passes over a frictionless pulley and a load of $5kg$ is suspended from other end of string. If coefficient of kinetic friction between trolley and surface be $0.1$, find the acceleration of trolley and tension in the string. (Take $g = 10ms^{-2}$).

A particle performs uniform circular motion with an angular momentum L. If the frequency of particle's motion is doubled and its K.E. is halved, what happens to its angular momentum?

In the expression $P = El^2 m^{-5} G^{-2}, E, m, l$ and $G$ denote energy, mass, angular momentum and gravitational constant, respectively. Show that $P$ is a dimensionless quantity.

The temperature and the relative humidity are 300K and 20% in a room of volume $50m^3$. The floor is washed with water, 500g of water sticking on the floor. Assuming no communication with the surrounding, find the relative humidity when the floor dries. The changes in temperature and pressure may be neglected. Saturation vapour pressure at 300K = 3.3kPa.

A proton describes a circle of radius 1cm in a magnetic field of strength 0.10T. What would be the radius of the circle described by an α-particle moving with the same speed in the same magnetic field?

A monkey climbs up a slippery pole for 3 seconds and subsequently slips for 3 seconds. Its velocity at time t is given by v(t) = 2t(3 - t); 0 < t < 3 and v(t) = -(t - 3)(6 - t) for 3 < t < 6s in m/s. It repeats this cycle till it reaches the height of 20m. How many cycles (counting fractions) are required to reach the top?

A straight wire carrying an electric current is placed along the axis of a uniformly charged ring. Will there be a magnetic force on the wire if the ring starts rotating about the wire? If yes, in which direction?

Find the speed of the electron in the ground state of a hydrogen atom. The description of ground state is given in the previous problem.

A sphere of mass $40kg$ is attracted by another mass of $15kg$ when their centres are $20cm$ apart, with a force of $1 \times 10^{-6} N$. Calculate the value of gravitational constant.

A block with a mass of $3.0\ kg$ is suspended from an ideal spring having negligible mass and stretches the spring by $0.2m$.

What is the force constant of the spring?
What is the period of oscillation of the block if it is pulled down and released?