Determine the sign of Delta S degree for each of the following: C_6 H_6 (s) righ

Question

Determine the sign of Delta S degree for each of the following: C_6 H_6 (s) rightarrow C_6 H_6 (l) 2 SO_2 (g) + O_2 (g) rightarrow 2 SO_3 (g) Which of the following is a part of Dalton's atomic theory? The specific heat of copper is 0.385 J/(g degree C). If 34.2 g of copper, initially at 25 degree C, absorbs 4.689 kJ, what will be the final temperature of the copper? A proton is approximately Which are isotopes? An atom that has an atomic number of 34 and a mass number of 76 is an isotope of an atom that has How many protons (p), neutrons (n), and electrons (e) are in one aton of _12^23 Mg? How many moles and how many atoms of zinc are in a sample weighing 34.9 g?

Explanation / Answer

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Q23)

The phase is changing from solid to liquid, hence the entropy will be going to increase since the randomness in liquid is more compared to solid

Hence the delta S is positive for the first reaction

For the second 3 moles of gases is forming 2 moles of gaseous products at the output, hence the delta n = -1, therefore the delta S will be negative in this case since randomness has been reduced

Hence correct answer is Option C

Q24) The correct answer is Option A, atoms rearrange in requisite proportions to form bigger compounds

Q25)

Heat = mass * specific heat * (change in temperature)

4689 = 34.2 * 0.385 * (change in temperature)

change in temperature = 356.11

Tnew = Told + 25 = 381.11 Celsius

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