What is the total amount of heat absorbed in kJ when 39 grams of diethyl ether at 20 °C is heated to 136 °C? Molar Mass: 74g/mol Melting Point: -116°C Boiling Point: 34.5 °C Heat of Fusion (Hvap) 7,270 J/mol Heat of Vaporization (Hvap) 27,710 J/mol Cs(1) = 3.74 J/g-°C cs(g) = 2.35 J/g.°C Show work on upload.

I am pretty sure I have done part a, b, and need a limit for C but I can't see how it reduces to 1/p, also need help on the rest of them thank you.

Estimate the contribution of motion to the molar internal energyof nitrogen gas.

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how would I use hess's law? use steps please

Suppose you have a gas that obeys the following modified van der Waals equation: P(V – nb) = nRT a) In 1-2 sentences, provide a physical interpretation for this equation. HINT: Compare this with the actual van der Waals equation. What does the missing term represent? b) For a gas obeying this modified van der Waals equation, derive an expression for the work done by a reversible and isothermal change in volume. c) For this modified van der Waals equation (with n and b as constants), find the following two partial derivatives: i) V ji)

Calc molar heat

12. Consider 0.1 mole of a monotomic ideal gas (system) which is initially equilibrated at a tem- perature of 500 K in a container with a volume 1 of 1 m³, and then undergoes a reversible norisothermal expansion to a volume of 2 m³. 200(a) What is the energy change of the gas (in J units)? Seemee axismo (b) How much work is exchanged in the above process (in J units)? emoldong slon Su for (c) What is the entropy change of the gas (in J/K units)? 36 or (d) What is the entropy change of the universe (in J/K units)? (319)

Suppose we somehow get to absolute zero in a real system: a. How will we know that we are actually at 0 K? How will we take the systems temperature? b. How would/could we keep the system at 0 K? c. How do the Zeroeth, First, and Second Laws influence your answers to the previous questions? What do they say must happen to this system?

How is diffusion similar to entropy? Discuss using example