“Heat cannot by itself flow from a body at lower temperature to a body at higher temperature” is a statement or consequence of
AIEEE 2003, Medium
Download our app for free and get started
(a) Second law tells us about the preferred direction of heat flow
Download our app
and get started for free
Experience the future of education. Simply download our apps or reach out to us for more information. Let's shape the future of learning together!No signup needed.*
A piece of hot copper at $100^{\circ} C$ is plunged into a pond at $30^{\circ} C$. The copper cools down to $30^{\circ} C$, while the pond being huge stays at its initial temperature. Then,
A piece of hot copper at $100^{\circ} C$ is plunged into a pond at $30^{\circ} C$. The copper cools down to $30^{\circ} C$, while the pond being huge stays at its initial temperature. Then,
A cylinder with a movable piston contains $3\,moles$ of hydrogen at standard temperature and pressure. The walls of the cylinder are made of a heat insulator, and the piston is insulated by having a pile of sand on it. By what factor does the pressure of the gas increases if the gas is compressed to half its original volume?
Neon gas of a given mass expands isothermally to double volume. What should be the further fractional decrease in pressure, so that the gas when adiabatically compressed from that state, reaches the original state?
$100\ g$ of water is heated from $30^o C$ to $50^o C$. Ignoring the slight expansion of the water, the change in its internal energy is .......$kJ$ (specific heat of water is $4184\ J/kg/K$):
$0.08 \mathrm{~kg}$ air is heated at constant volume through $5^{\circ} \mathrm{C}$. The specific heat of air at constant volume is $0.17 \mathrm{kcal} / \mathrm{kg}^{\circ} \mathrm{C}$ and $\mathrm{J}=4.18$ joule $/ \mathrm{cal}$. The change in its internal energy is approximately.