Question

In: Chemistry

enthalpy change

Suggest why it is difficult to measure the enthalpy change directly when an anhydrous salt is converted to a hydrated salt.

Solutions

Expert Solution

It is difficult to measure the enthalpy change directly when an anhydrous salt is converted to a hydrated salt because of the following reasons:

 

We do not know the exact amount of hydration of the salt. Further it is very difficult to know the enthalpy change when a solid converts to another solid. Thus in order to know the actual amount of enthalpy change the solids are dissolved in water and the enthalpy change is observed.

Thus in order to know the actual amount of enthalpy change the solids are dissolved in water and the enthalpy change is observed.

Raffay answered 2 years ago
Next > < Previous

Related Solutions

enthalpy change
Explain why the enthalpy change of neutralisation of one mole of sulfuric acid, H2SO4, is not the standard enthalpy change of neutralisation.
standard enthalpy change of formation
a. Define standard enthalpy change of formation.b. Calculate the standard enthalpy change of formation of methane from the following standard enthalpy changes of combustion:carbon = –394 kJ mol–1hydrogen = –286 kJ mol–1methane = –891 kJ mol–1c. Calculate the standard enthalpy change of combustion of methane using the following bond energies:E(C — H) = +412 kJ mol–1E(O — O) = +496 kJ mol–1E(C — O) = +805 kJ mol–1E(O — H) = +463 kJ mol–1
True or False The change in enthalpy of a hypotehtical reversible process and the change in...
True or False The change in enthalpy of a hypotehtical reversible process and the change in enthalpy of it's representative actual processes are equal? Entropy production is greater for an irreversible process than a reversible process?
The change in enthalpy for a reaction is -25.8kJ. The equilibrium constant for the reaction is...
The change in enthalpy for a reaction is -25.8kJ. The equilibrium constant for the reaction is 1400 at 25 degrees Celsius. What is the equilibrium constant at 382 degrees Celsius?
The enthalpy change for a chemical reaction is the sum of the energy consumed in breaking...
The enthalpy change for a chemical reaction is the sum of the energy consumed in breaking bonds and the energy released during bond formation. One way to determine the overall energy change for a chemical reaction is to apply Hess’s law to add together a group of reactions which can be arranged such that the chemical equations, when combined, give the overall equation we are trying to characterize. The average propane cylinder for a residential grill holds approximately 18 kg...
The enthalpy change for a chemical reaction is the sum of the energy consumed in breaking...
The enthalpy change for a chemical reaction is the sum of the energy consumed in breaking bonds and the energy released during bond formation. One way to determine the overall energy change for a chemical reaction is to apply Hess’s law to add together a group of reactions which can be arranged such that the chemical equations, when combined, give the overall equation we are trying to characterize. part 1 Write a balanced chemical equation for the combustion of gaseous...
Using the data in the appendix of text, calculate the standard enthalpy change for each of...
Using the data in the appendix of text, calculate the standard enthalpy change for each of the following reactions: (A)   Si(s) + 2F2(g) ⟶ SiF4(g) (B)    2C(s) + 2H2(g) + O2(g) ⟶   CH3CO2H(l) (C)    CH4(g) + N2(g) ⟶   HCN(g) + NH3(g) (D)   CS2(g) + 3Cl2(g) ⟶ CCl4(g) + S2Cl2(g)
a) For the reaction: A(aq) ---> B(aq) the change in the standard free enthalpy is 2.83...
a) For the reaction: A(aq) ---> B(aq) the change in the standard free enthalpy is 2.83 kJ at 25 oC and 4.61 kJ at 45 oC. Calculate the value of this reaction's equilibrium constant at 75 oC. b) A container encloses 31.1 g of CO2(g). The partial pressure of CO2 is 2.66 atm and the volume of the container is 25.9 L. What is the average, or root mean square, speed (in m/s) of the CO2 molecules in this container?
How would you know if a reaction is spontaneous based on the enthalpy change
How would you know if a reaction is spontaneous based on the enthalpy change
Write a reaction for the dissolution of fluorite (CaF2) in water. Calculate the change in enthalpy,...
Write a reaction for the dissolution of fluorite (CaF2) in water. Calculate the change in enthalpy, entropy and free energy for this reaction at 25°C
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT