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Steam will have the greatest entropy
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What is the work done by 9.00 of water when it is all boiled to steam at 100?
Not enough information to answer. Water does not do work when transformed into steam. Once it exists as steam, work can be done as it converts back to water. You will always get less out than you put in. The energy you put in is called the enthalpy of vaporization, (delta H), is also called heat of vaporization or heat of evaporation. The energy required to transform water from a liquid into a gas at atmospheric pressure is 40.68 kilojoules per mole 2260 kilojoules per kilogram. Energy is the ability to do work. Creating steam requires energy. Water does not do work when transformed into steam. Steam, after it is created, can do work and in the normal steam engine, it is then converted back to water. That process involves a few basic issues such as pressure, temperature change and entropy which are not available with the data provided.
What would have the greatest mass 1 mole of iron atoms 2 moles of oxygen atoms 4 moles of carbon atoms or 1 mole of potassium atoms?
1 mole of iron atoms has the greatest mass - 55,845 g.
What weighs more a mole of sucrose or a mole of water?
A horse. nuff said
What happen to reaction if one mole hydrogen ions and one mole of hydroxide ions?
They will form one mole of water.
How many moles of water are present in half mole of water?
Your question is irrelevant. I think that you were trying to find the number of molecules present in half a mole of water. 1 mole of water contains 6.023 * 1023 number of molecules. Hence half mole contains half of that number of molecules which is 3.0115*1023.
One mole of ice at 273 k or one mole of water at the same temperature which one have greater entropy and why?
The water has more entropy, because its atomic structure is less ordered than the atomic structure of the ice.
What is the work done by 9.00 of water when it is all boiled to steam at 100?
Not enough information to answer. Water does not do work when transformed into steam. Once it exists as steam, work can be done as it converts back to water. You will always get less out than you put in. The energy you put in is called the enthalpy of vaporization, (delta H), is also called heat of vaporization or heat of evaporation. The energy required to transform water from a liquid into a gas at atmospheric pressure is 40.68 kilojoules per mole 2260 kilojoules per kilogram. Energy is the ability to do work. Creating steam requires energy. Water does not do work when transformed into steam. Steam, after it is created, can do work and in the normal steam engine, it is then converted back to water. That process involves a few basic issues such as pressure, temperature change and entropy which are not available with the data provided.
What is the si units of entropy?
Joules per Kelvin (J/K)
Does a mole of water weigh the same as a mole of hydrogen?
No. A mole of hydrogen (in its normal form) weighs 2 grams. A mole of water weighs 18 grams.
What would have the greatest mass 1 mole of iron atoms 2 moles of oxygen atoms 4 moles of carbon atoms or 1 mole of potassium atoms?
1 mole of iron atoms has the greatest mass - 55,845 g.
How many molecules are there in 39 grams of water?
Steam is just water. Water weighs the same per molecule regardless whether it is ice, water, or steam. That said, the molecular weight of water is right at 18 g/mole. So it seems that 9.0 grams of steam is about half a mole of water. Therefore we just divide avagrado's number by 2 and we get: 6.022 x 1023 / 2 = 3.011 x 1023 molecules
How many water molecules in 1.50 mole of water?
1.5 mole H2O x 6.02x10^23 molecules/mole = 9.03x10^23 molecules
Calculate the work done in J when 1.0 mole of water vaporoizes at 1.0 ATM and 100 celsius Assume that the volume of liquid water is negligible compared with that of steam at 100 celsius?
w=-p.v =-(1.0*100)=-100KJ
Why NaCl is very soluble but not CaO is only slightly soluble in water?
Its all to do with enthlapy and entropy. Anything which is soluble usually has a negative standard enthlapy of solution - the energy involved when 1 mole of solute dissolves in a solvent to give an infinately dilute solution. However, NaCl has a slightly positive enthalpy of solution, yet it dissolves. The reason for this is entropy - the change in the amount of disorder. When NaCl dissolves in solution, there is more chaos, more molecules within the solution. Any process that has a large positive entropy change will be favourable - spontaneous and can occur (reaction will 'go'). However, with CaO, the Ca2+ formed in solution has a high affinity (attraction to) for water molecules, hence a lot of water molecules are arranged orderly - less chaos and hence a negative entropy. This should in effect make the compound insoluble, however, the slight solubility is due to it still having a negative enthalpy change of solution - hence despite entropy it is still slightly soluble. (You may be asking how is dissolving CaO possible if entropy is negative? The entropy of the system maybe negative, but the entropy of the surroundings is positive (dissolving gives out heat - exothermic), hence the overall entropy (sum of both entropies) is positive and the reaction will 'go'.
How many molecules of water will be present in half mole of water?
6.022 * 10^23 = 1 mole 3.011 * 10^23 = 1/2 a mole
How much hydrogen would be required to produce 3.5 mole of water?
2H2 + O2 ---> 2H2O 3.5 mole of hydrogen will produce 3.5 mole of water.
What weighs more a mole of sucrose or a mole of water?
A horse. nuff said
