13.5g of liquid helium at its boiling point of −269 ∘ C, is heated until it is all boiled away. If the specific latent heat of vaporisation of helium is 21.1kJ/kg, how much energy is needed?Answer in kJ and assume no temperature change occurs as a result of this heat transfer.

2. 650g of water at 100 ∘ C is boiled continuously. If the latent heat of vaporisation of water is 2260000J/kg, how much energy is needed to boil the water? Assume that no temperature change occurs.Give your answer to three significant figures.

When 40 kJ of energy is transferred to a quantity of a liquid substance, its temperatureincreases by 20 K. When 600 kJ of energy is transferred to the same quantity of the liquid atits boiling temperature, it vaporizes completely at constant temperature. What isspecific latent heat of vaporizationspecific heat capacity of the liiquid

A balloon holding 4.50 moles of helium (He) gas absorbs 975 J of thermal energy while doing 127 J of work expanding to a larger volume.HINT(a) Apply the first law of thermodynamics. (b) Recall that the molar specific heat at constant volume, Cv, takes different values depending on whether the gas is monatomic or diatomic.Click the hint button again to remove this hint.(a)Find the change in the balloon's internal energy (in J). J(b)Calculate the change in temperature of the gas (in K). K

Energy is transferred to 15.5kg of ice at 0 ∘ C until it is all melted, but without any temperature change. If the latent heat of fusion of water is 334000J/kg, how much energy is needed to melt the ice?Give your answer in MJ. Ensure your answer is quoted to the correct number of significant figures.

A sample of helium behaves as an ideal gas as it is heated at constant pressure from 273 K to 391 K. If 18.0 J of work is done by the gas during this process, what is the mass of helium present? mg