Hi, how would i go about solving this problem: Zinc will displace copper from copper (II) sulphate solution according to the following equation: CuSO4(aq) + Zn(s) ? Cu(s) + ZnSO4(aq) If an excess of zinc powder is added to 50 cm3 of 1.0 moldm-3 copper(II) sulphate, the temperature increases by 6.3 oC. Calculate the enthalpy change for the reaction.
Hi, how would i go about solving this problem: Zinc will displace copper from copper (II) sulphate solution according to the following equation: CuSO4(aq) + Zn(s) ? Cu(s) + ZnSO4(aq) If an excess of zinc powder is added to 50 cm3 of 1.0 moldm-3 copper(II) sulphate, the temperature increases by 6.3 oC. Calculate the enthalpy change for the reaction.
Thanks
use E=cm delta T c=specific heat capacity of water m= mass of water or in this case the 50cm^3 of copper sulphate delta T=6.3 now number of moles of reactants can be found by using n=cv again with the copper sulphate.
finally use delta H=E/n to find the enthalpy change for the reaction
Hi how would i work this question, When 2.3 g of magnesium chloride dissolves in 200 cm3 of water, the temperature rose by 3.4 oC. Calculate the enthalpy change for the reaction.
Hi how would i work this question, When 2.3 g of magnesium chloride dissolves in 200 cm3 of water, the temperature rose by 3.4 oC. Calculate the enthalpy change for the reaction.
Thanks
Use DeltaH=-(cm deltaT)/n n=m/gfm to find the number of moles of magnesium chloride c is again specific heat capacity of water m= mass of water deltaT=3.4degrees C
Hi, last question what If 50 cm3 of 1.0 moldm-3 NaOH is added to 25 cm3 of 2.0 moldm-3 CH3COOH, the temperature rose by 8.3 oC. Calculate the molar enthalpy change for the reaction.
Hi, last question what If 50 cm3 of 1.0 moldm-3 NaOH is added to 25 cm3 of 2.0 moldm-3 CH3COOH, the temperature rose by 8.3 oC. Calculate the molar enthalpy change for the reaction.
This is exactly the same sort of thing however you have to work out the number of moles of both the NaOH and the CH3COOH using n=cv. The smallest value will be the limiting factor so use that in your deltaH=-(cm deltaT)/n equation