Download App

Thermodynamics — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysicsThermodynamics3 Marks
Question
Calculate the specific heat capacity at constant volume for a gas. Given specific heat capacity at constant pressure is $6.85 \mathrm{cal} \mathrm{~mole}^{-1} \mathrm{~K}^{-2}, \mathrm{R}=8.31 \mathrm{~J} \mathrm{~mole}^{-1} \mathrm{~K}^{-1}$ and $\mathrm{J}=4.18 \mathrm{~J} \mathrm{cal}^{-1}$.
✓

Answer

We know that, $\text{C}_\text{p}-\text{C}_\text{V}=\frac{\text{R}}{\text{J}}$ $6.85-\text{C}_\text{V}=\frac{8.31}{4.18}$ $\Rightarrow6.85-\text{C}_\text{V}=1.988$ $\Rightarrow \text{C}_\text{V}=6.85-1.988$ $\Rightarrow\text{C}_\text{V}=4.862\text{ cal mole}^{-1}\text{K}^{-1}$

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 string is wrapped on a wheel of moment of inertia $0.20kg-m^2$ and radius 10cm and goes through a light pulley to support a block of mass $2.0kg$ as shown in figure. Find the acceleration of the block.
→
Find the angle of deviation suffered by the light ray shown in figure. The refractive index $\mu=1.5$ for the prism material.
→
The pulley shown in figure has a radius of $20cm$ and moment of inertia $0.2kg-m^2$. The string going over it is attached at one end to a vertical spring of spring constant $50N/m$ fixed from below, and supports a $1kg$ mass at the other end. The system is released from rest with the spring at its natural length. Find the speed of the block when it has descended through $10cm$. Take $g = 10m/s^2​​​​​​​$.
→
The sufrace tension and vapour pressure of water at 20°C is $7.28 \times 10^{-2}N$ $m^{-1}$ and $2.33 \times 10^3$ Pa, respectively. What is the radius of the smallest spherical water droplet which can form without evaporating at 20°C?
→
What is a heat engine? What is the best way to increase efficiency of a heat engine? Is it possible to design a thermal engine that has $100\%$ efficiency?
→
A body of mass 5 kg is acted upon by two perpendicular forces 8 N and 6 N . Give the magnitude and direction of the acceleration of the body.
→
The moment of inertia of a uniform rod of mass $0.50kg$ and length $1m$ is $0.10kg-m^2$ about a line perpendicular to the rod. Find the distance of this line from the middle point of the rod.
→
Air $(\gamma=1.4)$ is pumped at 2atm pressure in a motor tyre at 20°C. If the tyre suddenly bursts, what would be the temperature of the air coming out of the tyre? Neglect any mixing with the atmospheric air.
→
A wheel rotating at a speed of 600rpm (revolutions per minute) about its axis is brought to rest by applying a constant torque for 10 seconds. Find the angular deceleration and the angular velocity 5 seconds after the application of the torque.
→
A body is released at a distance r from the centre of the earth. Prove that the velocity v of the body when it strikes the surface of the earth is given by, $\text{v}=\text{R}\Big[2\text{g}\Big(\frac{1}{\text{R}}-\frac{1}{\text{r}}\Big)\Big]^{\frac{1}{2}}$ where R is the radius of the earth r > R.
→