Blog

Which of the following signs on q and w represent a system that is doing work on the surroundings, as well as losing heat to the surroundings?A) q = -, w = -B) q = +, w = +C) q = -, w = +D) q = +, w = -E) None of these represent the system referenced above.

For a process at constant pressure, 49,600 calories of heat are released. This quantity of heat is equivalent toA) 4.82 × 10-6 J.B) 1.19 × 104 J.C) 1.24 × 104 J.D) 2.08 × 105 J

Use the standard reaction enthalpies given below to determine ΔH°rxn for the following reaction:     2 S(s) + 3 O2(g) -> 2 SO3(g) ΔH°rxn = ?   Given:    SO2(g) -> S(s) + O2(g)  ΔH°rxn = +296.8 kJ    2 SO2(g) + O2(g) -> 2 SO3(g) ΔH°rxn = -197.8 kJ    A) -494.6 kJ  B) -692.4 kJ  C) -791.4 kJ  D) 1583 kJ  E) -293.0 kJ

Identify the greatest source of energy in the United States.A) petroleumB) natural gasC) waterD) coalE) nuclear power

Which of the following statements is TRUE?A) State functions do not depend on the path taken to arrive at a particular state.B) DErxn can be determined using constant volume calorimetry.C) Energy is neither created nor destroyed, excluding nuclear reactions.D) ΔHrxn can be determined using constant pressure calorimetry.E) All of the above are true.

Calculate the change in internal energy (ΔE) for a system that is giving off 65.0 kJ of heat and is performing 855 J of work on the surroundings. A) 64.1 kJB) -64.1 kJC) -65.9 kJD) 9.00 x 102 kJE) -9.00 x 102 kJ

Which of the following signs on q and w represent a system that is doing work on the surroundings, as well as losing heat to the surroundings?A) q = -, w = -B) q = +, w = +C) q = -, w = +D) q = +, w = -E) None of these represent the system referenced above.

Explain the Jewish understanding of evil and how it entered the world. How does this view affect Jewish ideas about repentance and justice?

The energy associated with the motion of a speeding bullet is called _____.  A) heat B) internal energy C) temperature D) kinetic energy E) potential energy

Thermochemistry_Formula_Sheet.docx