How heat energy is transferred?

Answer these (a) How much energy is transferred when 1 g. of boiling water at 100^@ C condenses to water at 100^@ C ? (b) How much energy is transferred when 1 g. of boiling water 100^@C cools to water at 0^@ C? (c) How much energy is released or absorbed when 1 g. of water at 0^@ C freezes to ice at 0^@ C ? (d) How much energy released or absorbed when 1 g. of steam at 100^@ C cools to ice at 0^@ C?

Assertion (A) : Heat energy is transferred from one body to another due to a temperature difference between them. Reason (R) : Heating a substance causes a rise in temperature.

Assertion & Resson:Direction: Mark the correct choice as Assertion: Radiation is a from of heat transfer which takes place even in vacuum. Reason: The thermal energy is transferred from one part of a substance to another part without the actual movement of the atoms or molecules.

Heat energy is always transferred from ______ to _______ temperatures.

Sometimes it is said that "heat is developed" in a resistance when there is an electric eurrent in it .Recall that heat is defined as the energy being transferred due to the temperature difference, Is the statement under quotes technically correct?

(i) What are the characteristic features of heat energy transfer? (ii) Explain linear expansion with diagram?

How much heat energy is required to melt 5 kg of ice? (Specific latent heat of ice = 336 Jg^(-1) )

(1)/(2) mole of helium is contained in a container at STP . How much heat energy is needed to double the pressure of the gas keeping the volume contant ? Heat capacity of gas is 3 J g^(-1) K^(-1)