Question

How much heat is required to convert 500g of water at 100c to steam at 100c

Answer 1

hear is your answer HOPE IT IS HELPFUL

Answer 2

To find:

Amount of heat required to convert 500 grams of water at 100°C to steam at 100°C ?

Calculation:

This is an example of change in state of water from liquid to gaseous state. This change of state requires the LATENT HEAT OF VAPOURISATION

• Since this amount of energy is used to change the state, the temperature remains constant (at 100°C in this case)

• Thats why it's called "Latent Heat" , because "latent" word means "hidden".

[Specific latent heat of vapourisation for water is 540 kCal/kg]

$\rm \therefore \: energy = (amount \: of \: water) \times (specific \: latent \: heat)$

$\rm \implies\: energy = m\times L$

$\rm \implies\: energy = \dfrac{500}{1000} \times 540$

$\rm \implies\: energy = \dfrac{1}{2} \times 540$

$\rm \implies\: energy = 270 \: kcal$

So, the net energy required is 270 kCal.