chemistry

calculate the internal energy change for each of the following.
a. one hundred(100.)joules of work are required to compress a gas. at the same time the gas releases 23 J of heat.
b. a piston is compressed from a volume of 8.30 L to 2.80 L against a constant pressure of 1.90 atm. in the process, there is a heat gain by the system of 350. J.
c. a piston expands against 1.00 atm of pressure from 11.2 L to 29.1 L. in the process, 1037 J of heat is absorbed.

  1. 👍
  2. 👎
  3. 👁
  1. delta E = delta H + w and w = -P*delta V.
    Watch the signs.

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. (2-8) Chemistry - Science (Dr. Bob222)

    Which of the following statements is correct? A) The internal energy of a system increases when more work is done by the system than the heat that flows into the system. B) The system does work on the surroundings when an ideal

  2. Chemistry

    The standard internal energy change for a reaction can be symbolized as ΔU°rxn or ΔE°rxn. For the following reaction equations, calculate the energy change of the reaction at 25 °C and 1.00 bar. Sn(s) + 2Cl2(g) --> SnCl4(l)

  3. chemistry

    The standard internal energy change for a reaction can be symbolized as ΔU°rxn or ΔE°rxn. For the following reaction equations, calculate the energy change of the reaction at 25 °C and 1.00 bar. Sn(s) + 2Cl2(g) --> SnCl4(l)

  4. physics

    15 joules of work are done by forces other than gravity in taking an object from a position 3 m above the ground to a position 8 m above the ground. What is the change in the gravitational potential energy of the object? o A. It

  1. chemistry

    The change in internal energy for the combustion of 1.0 mol of octane at a pressure of 1.0 atm is 5084.3kJ. if the change is enthalpy is 5074.1kJ, how much work is done during the combustion?

  2. physics

    A closed 2.0-L container holds 3.0 mol of an ideal gas. If 200 J of heat is added, what is the change in internal energy of the system? A. 300 J B. 150 J C. zero D. 100 J E. 200 J -Since there is no mention of work being done I

  3. chemistry

    Calculate how many joules of (total) heat energy are needed to convert the ice at -25.0 *C to steam at 100.0 *C?

  4. science

    One hundred (100.) joules of work is required to compress a gas. At the same time, the gas releases 65 J of heat. Internal energy change

  1. physics

    A skier of mass 70kg is pulled up a slope by a motor-driven cable. The acceleration of gravity is 9.8m/s^2. How much work is required to pull him 60m up a 30.7º slope (frictionless) at a constant speed of 3 m/s? answer in units

  2. Chemistry

    A reaction at 3.24 atm consumes 5.10 L of a gas adiabatically (q = 0). Calculate the change in internal energy of the system (in kJ).

  3. chem

    A chemical reaction is run in which 736 Joules of work is done by the system and the internal energy changes by -1370 Joules. pls help me

  4. Chemistry

    A chemical reaction is run in which 132 joules of work is done by the system amd the internal energy changes by 469 joules. Calculate the amount of heat transferred. u=q+w I was going to do 469 = q + 132 but I think this is wrong.

You can view more similar questions or ask a new question.