Physical Chemistry Answers

Other than hydrogenation of benzene, take three reactions in which benzene reacts differently than the hypothetical 1,3,5-cyclohexatriene and explain the mechanism and reasons behind this

mechanism

The hypothetical heats of hydrogenation for 1,3,5-cyclohexatriene is different from the heats of hydrogenation of benzene. Explain this in detail.

Draw the Pressure v/s Volume graph for all the 4 steps of Carnot Cycle and state

which steps are isenthalpic (Involve no change entropy). Can a Carnot engine be 100

% efficient?

A winning racehorse is under investigation after a three-time winning streak. Describe the process used by the scientist and the officials hired to give them the information needed to determine the winner. Note the samples include both acidic and basic components. 

What is the temperature needed for the thermal decomposition of CaCO₃? What are the apparatus and procedures to measure the rate of reaction for the thermal decomposition of CaCO₃ by monitoring the volume of CO₂ produced? (Please give me steps)

Find the mass percent of CuSO4 in a solution whose density is 1.30 g/mL and whose

molarity is 1.22 M.

A. 22.1 %

B. 12.4 %

C. 15.0 %

D. 31.6 % 

An isolated system is divided into 2 parts by a rigid, impermeable, thermally conducting wall. Let heat q1 flow into part 1. Use the first law to show that the heat flow for part 2 must be q2 = - q1

Butane is a gas that is commonly used for camping stoves and lighters. By mass, it is made up of 82.6% of Carbon and 17.4% of Hydrogen. Look for its empirical formula. If I have 7.85g of Butane in a 1.5 liter tank, with a pressure and temperature reading of 2.5 atmospheres (ATM) and 65.0 ^oC respectively. What is its molar mass and its molecular formula?

a reaction has an activation energy of 84 kJ/mol. What is the effect on the rate of raising the temperature from 100°c to 110°c given that R= 8.314J/mol/K

Find the weight of H2 stored in 100-cm3 cylindrical tank at 100

oC and 100 atm (10, 132.5 KPa)

using (a) Ideal gas equation (b) van der Waals equation if a = 0.244 atm-L

2

/mole

2 and b = 0.0266

L/mole. (Note: Use the method of successive approximation to solve for the mass of H2

)