khaled asked in Science & MathematicsPhysics · 2 months ago

# pls help asap?

The heat energy needed to change a substance directly from solid to gas is called? *

Latent heat of fusion

Latent heat of vaporization

Latent heat of sublimation

Specific heat of capacity

How much thermal energy must be added to 1.5 Kg of water at 100 degrees Celsius to make steam at 100 degrees Celsius? *

Q = 4480000 J

Q = 2200000 J

Q = 3390000 J

Q = 2050000 J

The addition of 1,150,000 J of thermal energy is required to convert a block of ice at – 15 degrees Celsius to water at 15 degrees Celsius. What is the mass of the block of ice? *

m = 2.68 Kg

m = 2.01 Kg

m = 4.50 Kg

m = 3.98 Kg

The heat energy needed to change or freeze a substance from liquid into a solid is best know as? *

Latent heat of fusion

Latent heat of vaporization

Latent heat of sublimation (Ls)

Specific heat

_____________ is the thermal energy required to change the temperature of 1 kg of a substance from one phase to another. *

Specific heat

Wasted heat

Sufficient heat

Latent heat

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Lv 7
2 months ago

The heat energy needed to change a substance directly from solid to gas is called? Latent heat of sublimation

How much thermal energy must be added to 1.5 Kg of water at 100 degrees Celsius to make steam at 100 degrees Celsius?

Q = 2,260 kJ/kg(1.5 kJ) =  3390000 J

The addition of 1,150,000 J of thermal energy is required to convert a block of ice at – 15 degrees Celsius to water at 15 degrees Celsius. What is the mass of the block of ice?

1150000 = m[2108 J/kg°C)(0 - (-15) °C) + 334000 + 4184 J/kg°C(15 - 0 °C)]

m = 2.68 Kg

The heat energy needed to change or freeze a substance from liquid into a solid is best know as? Latent heat of fusion

Latent heat is the thermal energy required to change the temperature of 1 kg of a substance from one phase to another.