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What is the enthalpy of vaporization of liquid if temperatures are 225 and 675 and pressures are 3.57 and 5.87?
DREMC2
Always state the units of measurement that pertain to your problem. A temperature is not 225, it could be 225o Celsius (or Kelvin, or Fahrenheit) and pressure is not 3.57, it could be 3.57 Pascals, or other units. No one can solve this problem if you do not give the units of measurement.
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∙ 11y ago
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Why is the enthalpy of sublimation is equal to the sum of enthalpy of fusion and enthalpy of vaporization?
Enthalpy is a state function, and to a first approximation does not depend on temperature. So the change in enthalpy to go from solid to a gas directly (sublimation) at some temperature is equal to the sum of the enthalpies associated with going from a solid to a liquid (fusion) and going from a liquid to a gas (vaporization) at other temperatures.
Why does water evaporate quicker than liquid soap?
The enthalpy of vaporization is different.
The amount of energy needed to change a material from a solid to a liquid is the heat of what?
The latent heat of evaporation
What is the heat that causes liquid water to evaporate from your skin called?
The phenomenon is called perspiration; each liquid has a specific enthalpy of vaporization.
What is the relation of the molar heat of fusion to the molar heat of vaporization?
Molar heat of fusion: the heat (enthalpy, energy) needed to transform a solid in liquid (expressed in kJ/mol). Molar heat of vaporization: the heat (enthalpy, energy) needed to transform a liquid in gas (expressed in kJ/mol).
What Heat of is the energy needed for a substance to change from liquid state to a gaseous state?
Heat of vaporization or enthalpy of vaporization. It is the additional energy, per unit mass, required after vaporization temperature (boiling point) is reached, to accomplish the change in state, from liquid to gas.
For one mole of any substance at its boiling point the difference in the enthalpy of its vapor is what?
The change in enthalpy is dH = TdS + VdP. Since the pressure P is the same for the the vapor and the liquid, the change in enthalpy is just TdS, which is just the latent heat.
What is the name of the energy needed to change a substance from a liquid to a gas?
The energy needed to change a substance from a liquid to a gas is called the enthalpy (or heat) of vaporization.
Is a liquid at normal temperatures and pressures a physical or chemical change?
This liquid is only a liquid, not a change.
What is the amount of energy required to change a material from a liquid to a gas?
Latent Heat of Evaporation, or Evaporation Enthalpy. It is given in units of energy over unit of mass, i.e., KJ/Kg.
The heat needed to boil away one gram of a liquid at its boiling point is?
The heat needed to melt one gram of a solid at its melting point is the heat of fusion.
What is the difference between heat of fusion and heat of vaporization?
Latent heat is the amount of thermal energy required to change the phase of a substance. Latent heat of fusion is the amount of energy needed to change it from a solid to liquid or a liquid to solid, and the latent heat of vaporization is the thermal energy needed to change from a liquid to gas or a gas to liquid. For example, in the equation Q = mL, Lfusion (latent heat of fusion) for water is 75.5 cal/gram. Lvaporization (latent heat of vaporization) for water is 539 cal/gram. Substances have different latent heats.
