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The molar enthalpy of vaporization of methanol is 38.0kjmol at 25c how much heat energy is transfer is required to convert 250.0 ml of the alcohol from liquid to vapor the density of CH3OH .787gml?
Wiki User
∙ 15y ago
that means that you have to vaporize 250.0*.787= 196.75 g of methanol, which is 196.75/32=6.148 mol of methanol. so, one needs 6.148*38.0=233.64 kJ of heat.
Wiki User
∙ 15y ago
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What is the relationship between metallic bond strength and enthalpy of vaporization?
Metallic bond strength refers to the amount of energy as heat required to vaporize the metal. The enthalpy of vaporization is defined as the amount of energy absorbed as heat when a specified amount of substance vaporizes at constant pressure. Metallic bond strength increases as the enthalpy increases.
What is called to the amount of energy needed to melt one mol a substance?
First things first: it's actually spelled "enthalpy", which might be why you're not finding it.If you want a number, you will need to specify a substance.If you just want to know what it means, then in simple terms it's the amount of energy required to evaporate one mole of the substance.
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.
Energy required to boil one mole of a substance?
heat of vaporization
How much energy is required to vaporize 2kg of water at 100c?
The latent heat for water to steam is 550 calories (2310 Joules) per gram. For 2 grammes, double these figures.
What energy is required for water to evaporate from a puddle?
The enthalpy of vaporization for water is 40,65 kJ/mol.
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.
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.
What is the difference in the enthalpy of vapor and enthalpy of gas of any substance?
As far as thermodynamics is concerned, vapor and gas are the same thing. The one possible exception is if you include a mist as a type of vapor. A mist is actually tiny droplets of liquid suspended in a gas, thus the "vapor" is actually liquid rather than gas. Likewise, smoke - a suspension of very find particulates in a gas - will not be the same phase as just plain gas. If you are actually trying to ask about enthalpy of vaporization vs the enthalpy in the gas phase, you can calculate the enthalpy of the gas relative to a reference state (where you have arbitrarily defined the enthalpy to be zero) by taking the energy required to take the substance from the reference state to a point where you know the enthalpy of vaporization, plus the enthalpy of vaporization at a known temperature and pressure, and then add the energy required to take the gas from that temperature and pressure to the final state. If your reference state is actually a solid, you might have to include steps to take the substance from solid to liquid as well.
What is the relationship between metallic bond strength and enthalpy of vaporization?
Metallic bond strength refers to the amount of energy as heat required to vaporize the metal. The enthalpy of vaporization is defined as the amount of energy absorbed as heat when a specified amount of substance vaporizes at constant pressure. Metallic bond strength increases as the enthalpy increases.
How much joules are gained by water during evaporation?
It takes 333.51 or 334 joules to evaporate 1 gram of H2O.
What is called to the amount of energy needed to melt one mol a substance?
First things first: it's actually spelled "enthalpy", which might be why you're not finding it.If you want a number, you will need to specify a substance.If you just want to know what it means, then in simple terms it's the amount of energy required to evaporate one mole of the substance.
What is the latent heat of vaporization?
It is the additional amount of heat [measured in (the "big") calories ] required to cause boiling/vaporization of a liquid already at the boiling/vaporization temperature. Heat of vaporization is the amount of heat (540 calories/gram) needed to change a specific amount of liquid (1 gram) at it's boiling point into a gas without changing it's temperature. -Qwasas
Amount of heat necessary to change the state of substance?
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.
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.
Energy required to boil one mole of a substance?
heat of vaporization
How much energy is required to vaporize 2kg of water at 100c?
The latent heat for water to steam is 550 calories (2310 Joules) per gram. For 2 grammes, double these figures.
