How much thermal energy must be added to a 1.4 kg piece of lead to convert it from a solid to a liquid at 327.5∘? Latent heat of fusion for lead is Lf=2.32×104J/kg.​

Respuesta :

Answer:

energy is equal to mass times latent heat.

so, E = 1.4×2.32×10^4=44800 j

The correct answer is: 32480 j

Thermal energy

Thermal energy is the energy that is generated and measured by heat.

Solution:-

The thermal energy required for phase change and constant temperature.

energy is equal to mass times latent heat.

⇒thermal energy=[mass×latent hear]

where m=mass

           s=latent heat

so, E = 1.4×2.32×10^4=32480 j

NOTE: If the temperature is not constant than use Thermal energy=mass×latent heat×change in temperature.

i.e energy=msΔT

where m=mass

           s=latent heat

What is Latent heat?

Latent heat is the energy released or absorbed, by a body or a thermodynamic system, during a constant-temperature process.

Learn more about latent heat here: https://brainly.com/question/12760196

#SJP2