JEE Mains · Physics · STD 11 - 11. thermodynamics
A Carnot freezer takes heat from water at \(0\,^oC\) inside it and rejects it to the room at a temperature of \(27\,^oC\). The latent heat of ice is \(336 \times 10^3\, J\,kg^{-1}\). lf \(5\, kg\) of water at \(0\,^oC\) is converted into ice at \(0\,^oC\) by the freezer, then the energy consumed by the freezer is close to
- A \(1.51 \times {10^5}\,J\)
- B \(1.68 \times {10^6}\,J\)
- C \(1.71 \times {10^7}\,J\)
- D \(1.67 \times {10^5}\,J\)
Answer & Solution
Correct Answer
(D) \(1.67 \times {10^5}\,J\)
Step-by-step Solution
Detailed explanation
\(\Delta H = mL = 5 \times 336 \times {10^3} = {Q_{sink}}\) \(\frac{{{Q_{sink}}}}{{{Q_{source}}}} - \frac{{{T_{sink}}}}{{{T_{source}}}}\) \(\therefore {Q_{source}} = \frac{{{T_{source}}}}{{{T_{sink}}}} \times {Q_{sink}}\) Energy consumed by freezer…
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- A planar loop made of wire is rotating in a uniform magnetic field. At time \(t=0\), the plane of the loop is perpendicular to the magnetic field. If the loop is rotating about an axis passing through its plane with a period of \(10\) seconds, at which of the following times will the induced electromotive force (emf) be maximum and minimum, respectively?JEE Mains 2020 Hard
- The charge stored by the capacitor C in the given circuit in the steady state is _________ \(\mu C\).
JEE Mains 2026 Medium - The de-Broglie wavelength associated with a particle of mass \(m\) and energy \(E\) is \(\mathrm{h} / \sqrt{2 m E}\) The dimensional formula for Planck's constant is _______.JEE Mains 2024 Hard
- A charged particle going around in a circle can be considered to be a current loop. A particle of mass \(m\) carrying charge \(q\) is moving in a plane with speed \(v\) under the influence of magnetic field \(\overrightarrow{ B }\). The magnetic moment of this moving particleJEE Mains 2020 Hard
- The average mass of rain drops is \(3.0\times10^{-5}\, kg\) and their avarage terminal velocity is \(9\, m/s\). Calculate the energy transferred by rain to each square metre of the surface at a place which receives \(100\, cm\) of rain in a yearJEE Mains 2014 Medium
- An electric field of \(1000\,V/m\) is applied to an electric dipole at angle of \(45^o\). The value of electric dipole moment is \(10^{-29}\, C.m.\) What is the potential energy of the electric dipole?JEE Mains 2019 Medium
More PYQs from JEE Mains
- The acceleration of an electron in the first orbit of the hydrogen atom \((z\, = 1)\) isJEE Mains 2017 Hard
- In a triangle \(\mathrm{ABC}\), if \(|\overrightarrow{\mathrm{BC}}|=3,|\overrightarrow{\mathrm{C}}|=5\) and \(|\overrightarrow{\mathrm{BA}}|=7\), then the projection of the vector \(\overline{\mathrm{BA}}\) on \(\overline{\mathrm{BC}}\) is equal to:JEE Mains 2021 Easy
- Let the mean and variance of \(8\) numbers \(x , y , 10\), \(12,6,12,4,8\), be \(9\) and \(9.25\) respectively. If \(x > y\), then \(3 x-2 y\) is equal to \(...........\).JEE Mains 2023 Hard
- When the temperature of a metal wire is increased from \(0^{\circ} \,C\) to \(10^{\circ}\, C\), its length increases by \(0.02 \% .\) The percentage change in its mass density will be closest to:JEE Mains 2020 Hard
- The thermodynamic process, in which internal energy of the system remains constant is ...........JEE Mains 2023 Easy
- Three objects \(A, B\) and \(C\) are kept in a straight line on a frictionless horizontal surface. The masses of \({A}, {B}\) and \({C}\) are \({m}, 2\, {m}\) and \(2\, {m}\) respectively. \(A\) moves towards \({B}\) with a speed of \(9\) \({m} / {s}\) and makes an elastic collision with it. Thereafter \(B\) makes a completely inelastic collision with \(C.\) All motions occur along same straight line. The final speed of \(C\) is \(....\,{m} / {s}\)
JEE Mains 2021 Hard