thermodynamic properties

Based on the thermodynamic properties provided for methanol (below and to the right), determine from the following list the equation(s) necessary to calculate the amount of energy needed for 22.8 kg of methanol from all gas at 65°C to —112°C.

Is this overall process endothermic or exothermic?

Endothermic
Exothermic
Cannot be determined from the given information.

Solutions

Expert Solution

For conversion of methanol gas at 65 oc to -112.oc

The equations would be as follows,

Step 1: Gas at 65 oc to liquid at 65 oc

Q = n (-37 kj/mol)

Step 2: Liquid at 65 oc to liquid at -94 oc

Q = n (81.1 J/mol.oc), where dt is negative

Step 3: Liquid at -94 oc to solid at -94 oc

Q = n (-3.18 kj/mol)

Step 4: Solid at -94 oc to solid at -112 oc

Q = n (48.7 J/mol.oc), where dt is negative

Therefore, the overall process would thus be,

Exothermic

Heat is given off to cool the entire system.

Heat is given off to cool the entire system

Raffay answered 1 year ago

Next > < Previous

Related Solutions

Use the Gibbs distribution to calculate thermodynamic properties (including entropy, all relevant thermodynamic potentials, and heat...

Use the Gibbs distribution to calculate thermodynamic properties (including entropy, all relevant thermodynamic potentials, and heat capacity), of an ensemble of similar two-level systems, in thermodynamic equilibrium at temperature T that is comparable with the energy gap (delta). For each variable, sketch its temperature dependence, and find its asymptotic values (or trends) in the low- temperature and high-temperature limits. Also, calculate the probabilities of the energy level occupation, and give physical interpretations of your results, in both temperature limits.

Use the microcanonical distribution to calculate thermodynamic properties (including entropy, all relevant thermodynamic potentials, and heat...

Use the microcanonical distribution to calculate thermodynamic properties (including entropy, all relevant thermodynamic potentials, and heat capacity), of an ensemble of similar two-level systems, in thermodynamic equilibrium at temperature T that is comparable with the energy gap (delta). For each variable, sketch its temperature dependence, and find its asymptotic values (or trends) in the low- temperature and high-temperature limits. Hint: The two-level system is generally defined as any system with just two relevant states whose energies, say E0 and E1,...

The thermodynamic properties of foods can be discussed in terms of the enthalpy of combustion per...

The thermodynamic properties of foods can be discussed in terms of the enthalpy of combustion per gram of food. Do you get more energy from the metabolism of one gram of sugar or one gram of fat? Answer this question quantitatively and with as much thermodynamic detail as possible. Use two of the following three methods to quantify your answer: (A) arithmetic method, (B) calorimetry, and/or (C) computational.

Based on the thermodynamic properties provided for water, determine the amount of energy needed for 269...

Based on the thermodynamic properties provided for water, determine the amount of energy needed for 269 g of water to go from 85.5 °C to 161 °C. Property Value Units Melting point 0.0 °C Boiling point 100.0 °C ΔHfusΔHfus 6.01 kJ/mol ΔHvapΔHvap 40.67 kJ/mol cp (s) 37.1 J/mol·°C cp (l) 75.3 J/mol·°C cp (g) 33.6 J/mol·°C

Based on the thermodynamic properties provided for water, determine the energy change when the temperature of...

Based on the thermodynamic properties provided for water, determine the energy change when the temperature of 1.45 kg of water decreased from 109 °C to 23.0 °C.

Based on the thermodynamic properties provided for water, determine the energy change when the temperature of...

Based on the thermodynamic properties provided for water, determine the energy change when the temperature of 0.750 kg of water decreased from 117 °C to 38.5 °C. Property Value Units Melting point 0 °C Boiling point 100.0 °C ΔHfus 6.01 kJ/mol ΔHvap 40.67 kJ/mol cp (s) 37.1 J/mol · °C cp (l) 75.3 J/mol · °C cp (g) 33.6 J/mol · °C

Based on the thermodynamic properties provided for water, determine the energy change when the temperature of...

Based on the thermodynamic properties provided for water, determine the energy change when the temperature of 0.750 kg of water decreased from 111 °C to 51.0 °C. Melting point 0 °C Boiling point 100.0 °C ΔHfus 6.01 kJ/mol ΔHvap 40.67 kJ/mol cp (s) 37.1 J/mol · °C cp (l) 75.3 J/mol · °C cp (g) 33.6 J/mol · °C

Give 2 examples of how to determine a thermodynamic properties (H, S, G, etc) of a...

Give 2 examples of how to determine a thermodynamic properties (H, S, G, etc) of a substance by using the thermodynamic diagrams (PH Diagram, TS Diagram and Mollier Diagram). Give 2 examples of how to determine a thermodynamic properties (H, S, G, etc) of a substance by using the tables of thermodynamic properties. Each example must be different from each other

Give 2 examples of how to determine a thermodynamic properties (H, S, G, etc) of a...

why can you write U (Internal energy) as a function of two thermodynamic properties and not...

why can you write U (Internal energy) as a function of two thermodynamic properties and not all three (P, V, T)? Why is the state fully specified by specifying only two properties? what is the internal energy state equation?

Subjects