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Molar bond enthalpy shows the change in a bond association. For example, if one mole of bond is broken, the energy change that results is DHd (degree).
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How do you calculate molar enthalpy change when tungsten is heated by 15 K?
23
How does molar enthalpy of fussion of ice compare with the molar enthalpy of fussion of other solids?
it is relatively large
What is the difference between enthalpy change and enthalpy change per mole?
Enthalpy is the energy absorbed or lost from a reaction, but enthalpy change per mole is the amount of energy lost per mole, so in order to get the overall enthalpy from the change per mole, you must multiply that value by the amount of moles used in the reaction.
Molar Enthalpy of Candle Wax C25H52?
-1308.3 kJ
Why is the molar enthalpy of the decomposition of that compound 192 kJ?
because of the law of conservation of energy...
How do you calculate molar enthalpy change when tungsten is heated by 15 K?
23
How does molar enthalpy of fussion of ice compare with the molar enthalpy of fussion of other solids?
it is relatively large
What is the difference between enthalpy change and enthalpy change per mole?
Enthalpy is the energy absorbed or lost from a reaction, but enthalpy change per mole is the amount of energy lost per mole, so in order to get the overall enthalpy from the change per mole, you must multiply that value by the amount of moles used in the reaction.
What is the standard molar enthalpy change of combustion for coconut oil?
Coconut oil is a mixture not a compound.
Molar Enthalpy of Candle Wax C25H52?
-1308.3 kJ
What is relation between hydration energy lattice energy and enthalpy of solution?
enthalpy change of solution=enthalpy change of hydration - enthalpy change of lattice
What is the standard molar enthalpy of formation for ammonium chloride aq?
-299.65 kJ/mole
Why is the molar enthalpy of the decomposition of that compound 192 kJ?
because of the law of conservation of energy...
How does the presence of a catalyst affect the enthalpy change of a reaction?
The presence of a catalyst affect the enthalpy change of a reaction is that catalysts do not alter the enthalpy change of a reaction. Catalysts only change the activation energy which starts the reaction.
The molar enthalpy of vaporization of benzene at its boiling point 353.25 K is 30.8 kJ mol-1 What is the molar internal energy change?
It should be 0 as internal energy is a function of temperature, i.e: U (T) At the boiling point, there is no change in temperature, and hence DU= 0
When are the quantites molar enthalpies of fusion and molar enthalpy of vaporation used?
Fusion refers to the phase change from liquid to solid (or vv) and vaporization refers to the phase change from liquid to gas (or vv). Heat is either absorbed or released from the substance when these events occur. We use the molar enthalpies to calculat exactly how much heat is transferred during these processes. Ex .. If we are to boil (vaporize) 3 moles of some substance with a known molar enthalpy of vaporization of 120 KJ/mole then we multiply. 3 moles x 120 KJ/mole = 360 KJ of energy is needed for the vaporization to take place.
What is the enthalpy of a reaction?
The amount of energy that is used or released as heat in a reaction.
