Thermodynamics

Calculate the height of a column of water equivalent to atmospheric pressure of 1bar if the water is at 150C. What is the height if the water is replaced by Mercury?

At certain locations geothermal energy in undergound water is available and used as the energy source for a power plant. Consider a supply of saturated liquid water at 150°C. What is the maximum possible thermal efficiency of a cyclic heat engine using this source of energy with the ambient at 20°C? Would it be better to locate a source of saturated vapor at 150°C than use the saturated liquid at 150°C?  

Calculate the standard reaction enthalpy for the reaction of calcite with hydrochloric acid

CaCO₃(s) + 2 HCl(aq) →

CaCl₂(aq) + H₂O(ℓ) + CO₂(g)

The standard enthalpies of formation are: 

for CaCl₂(aq) : −877.1 kJ/mol; 

for H₂O(ℓ) : −285.83 kJ/mol; 

for CO₂(g) : −393.51 kJ/mol; 

for CaCO₃(s) : −1206.9 kJ/mol; and 

for HCl(aq) : −167.16 kJ/mol.

1. −72.7 kJ/mol 

2. −38.2 kJ/mol 

3. −215 kJ/mol 

4. −116 kJ/mol 

5. −165 kJ/mol 

6. −15.2 kJ/mol 

 7. −98.8 kJ/mol

If the efficiency of a power plant goes up as the low temperature drops why not let the heat rejection go to a refrigerator at say –10°C instead of ambient 20°C?

What is the smallest temperature in degrees Fahrenheit you can have? Rankine?

State the scope of thermodynamics in thermal engineering.

Define different types of properties?

Convert the formula for water density in problem 21 to be for T in degrees Kelvin.

A flow of water at some velocity out of a nozzle is used to wash a car. The water then falls to the ground. What happens to the water state in terms of V, T and s? 

Write short notes on State, point function and path function.