Calorimetry

Two fuel samples were combusted using the same calorimeter. When 0.5402 g of the first fuel was burned, the temperature of the calorimeter increased by 1.57 degrees Celsius. When 0.3263 g of the second fuel was burned, the temperature increase was 1.23 degrees Celsius. The chemical energy of the first sample was 23.6 kJ/g. Calcu ...continues

Enthalpy of Formation

Calcium metal burns according to the following equation: Ca(s) + 1/2 O2(g) --> CaO (s). When 1.00 g of calcium metal is burned in a constant pressure calorimeter with a heat capacity of 15.20 kJ/K, the temperature increases by 1.04 degrees Celcius. Calculate the enthalpy of formation of calcium oxide. Compare this answer with - ...continues

Chemistry-Thermodynamics

When an explosive is detonated inside a shell or cartridge case, the explosion effectively takes places in a closed or fixed volume container. (The chemical decomposition is fast compared to the rate at which the projectile can gain velocity.) You can make an estimate of the explosion temperature if you assume a constant volume, ...continues

Thermodynamics

Estimate the temperature inside a cylinder of an internal combustion engine just after the spark has ignited the fuel. You are provided with the following list of assumptions. Assume the cylinder has a volume of 10 liters. Assume that the oxidant is air containing 20% oxygen. Assume that the fuel is octane (C9H18, molar mass = 1 ...continues

Mass - Aspirin Question

Please see the attached file for full problem description.

A popular brand of low-fat shredded cheddar cheese advertises...

Please see the attached file for full problem description. --- A popular brand of low-fat shredded cheddar cheese advertises that it provides 1.5 g of fat with 15 Calories from total fat per serving. There are 50 Calories per serving and of the total fat, 1.0 g is saturated fat. A serving is defined as ¼ cup or 28 g. Is this ...continues

Entropy

The experimental specific heat capacity of argon is 0.5213 J/g/K at a pressure of 1 atmosphere at 300 K. Argon's entropy at 300 K is 3.877 J/g/K. Use these data to calculate the entropy of argon at 500 K.

Problem set

Please see the attached file for full problem description. --- 21. Butadiene, H2C ===CH----CH==CH2, is polymerized to make buna rubber. Write an equation representing this process. Is this am example of addition or condensation polymerization? 23. Kevlar is a type of nylon called an aramid that contains aromatic rings. Be ...continues

Problem set

Please see the attached file for full problem description. --- 18. Identify the functional groups in morphine and Demerol. Can these molecules be assigned to a particular class of compound? Why or why not? 21. Why of these compounds can exist in chiral forms? OH I a. ...continues

Free Energy and the Spontaneity of Chemical Reactions

Is the formation of diatomic oxygen from ozone a spontaneous or nonspontaneous process at standard conditions? If it is a spontaneous process, does it necessarily happen at a finite rate? How do you know if a process is spontaneous or nonspontaneous?