Homework Statement
Calculate the heat absorbed by the water in the calorimeter and the heat released by 1,0g of burning ethanol. Then, calculate the molar heat of combustion (kJ/mol) of the ethanol.
The calorimeter used was very makeshift: ethanol in an alcohol burner was lit under a can...
Homework Statement
Give the structure of C8H8O3.Homework Equations
IR tells us that there is an OH group and a C=O group
Degree of saturation = 5 --> Benzene ring + C=O
H NMR spectrum shows:
Peak at ~7.8ppm integrating for 1H and is a doublet
Peak at ~7.45ppm integrating for 1H and is a...
Homework Statement
A kettle containing 1kg of boiling water is heated until complete evaporation. Calculate q, w, "delta"U and "delta"H for this process. Suppose that the water vapor is an ideal gas and molar "delta"H of vaporisation at 373K = 40.6kJ/mol.Homework Equations
H = U + PV
"delta"U =...
Homework Statement
Given a molecule of chloroethene (vinyl chloride) or ClCH=CH2. Rank the hydrogen atoms in the molecule in terms of which will have the greatest chemical shift.
Homework Equations
None
The Attempt at a Solution
Since the Cl and the double bond are both...
The densities of ice and water at 0*C are 0.9168 and 0.9998g/cm3. The latent heat of ice is 80cal/g. What is "delta"H and "delta"U (enthalpy and internal energy, respectively) when 1kg of ice is melted?
I'm really confused on which formulas to use and if the densities are even relevant to this...
hi, I built a crane using hydraulics to move the arm and using an electromagnet at the end of the arm to pick up and move metal objects... what other applications could use hydraulics and electromagnets?