Setup of each problem must be shown when performing ANY CALCULA s sluthion Cadon

Question

Setup of each problem must be shown when performing ANY CALCULA s sluthion Cadons Cdions as accepted as commen reserense tor re Attention should be given to significant figuresconcentratims ,w N from this point o 2. Consider the following figure 1 atm 1 atm reaction 5 moles 4 moles The following reaction has E--1 86 kJ/mol. a) Is the sign of PAV negative or positive? Explain ative b) What is the sign and approximate magnitude of AH? Explain. , mell du mus+ be remtive, s'ce du is nemmemd W is positive 3. Assume that a particular reaction evolves 244 kJ of heat and that 35 kJ of PV work is gained by the system. (A's.ve, srsem oninS uort.) a-AE tRV What is the value ofE? or

Explanation / Answer

2.

(a)

From the photo it is observed that the volume has been decreased, that means work is done on the system, so, w is positive.

(b)

deltaH = deltaE + PdeltaV

deltaH = - 186 + PdeltaV

So, deltaH is less negative than deltaE

(c)

deltaE = q + pdeltaV

deltaE = - 244 + 35 = - 209 kJ

****

deltaH = deltaE + PdeltaV

At constant volume,

deltaV = 0

So, deltaH = deltaE + P (0)

deltaH = deltaE

therefore,

At constant volume deltaH becomes equal to deltaE

Related Questions

Navigate

• Browse (All)
• Browse S
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.