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Two blocks of the same metal and mass are at different initial temperatures T1 and T2. The blocks are brought into contact and come to a final temperature Tf. Assume the system is totally isolated from the surroundings and that the surroundings are at equilibrium. a. Your intuition probably tells you that for 2 identical blocks, Tf is the average of the initial temperatures, so that Tf = 1/2 (T1 + T2). Show that for a system of two blocks totally isolated from the surroundings that this is true. b. Show that the change in entropy is ?S = CP ln T1 + T2 ( )2 4T1 T2 c. How does this expression show that this process is spontaneous?
In the following reaction, how many grams of NaBr will produce 244 grams of NaNO3? Pb(NO3)2(aq) + 2 NaBr(aq) PbBr2(s) + 2 NaNO3(aq)
What mass of silver is needed to absorb 50.0 cal of heat if the tempature of the sample rises from 24 c to 36.4 c Specific heat of silver
Write he basic principles and instrunmentaion of conductomery
a sample of helium gas initially at 37 degrees celsius, 785 torr and 2.00L was heated to 58.0 degrees celcius while the volume expanded to 3.24L. What is the final pressure in atm.
When 0.549 moles of a certain gas fill a balloon the volume is 75 mL. If enough of the same gas is added to the balloon until 1.44 moles of gas are present, what is the new volume of the balloon?
When a glow stick is placed in a freezer, its chemiluminescence lasts a significant time longer. How might this come about?
A certain weak base has a Kb of 7.40 × 10-7. What concentration of this base will produce a pH of 10.11
If 465 mL of oxygen at STP is used in the reaction, what volume of CO2 measured at 37 degrees C and 0.973 atm, is produced?
For the reaction:2CH4(g) C2H2(g) + 3H2(g) 0.115 mole of CH4 was placed in a 1.00 L container. At equilibrium it was found that the [C2H2] = 0.035 M. What is the value of the equilibrium constant?
Enough Al2(SO4)3 solid is added to water to prepare 100.0 mL of a 0.150 M solution of aluminum sulfate. What is the concentration of sulfate ion in solution?
solution containing the iron(II) thiocyanate complex is 0.45, Then calculate the mile per liter concentration of the complex
Explain in your own words what consitutes a buffer solution. Then explain how this solution resists changes in pH when strong acids or strong bases are added to it.
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