Metal Coffee Cup
Write the balanced equation for the reaction that takes place in the calorimeter.?
A coffee cup calorimeter contains .0375 mol HCl dissolved in 1.5 x 10^2 mL of water at 20.51 degrees C. When 1.75 g of solid zinc metal is placed in the calorimeter the temperature rises to 29.02 degrees C. Assume that no heat is lost to the surroundings.
Write the balanced equation for the reaction
Zn (s) & 2 HCl (aq) –> ZnCl2(aq) & H2 (g)
================================================
p.s.
dH = mC dT
dH = 151.75 G (4.184 J/g-C)(8.51 C rise )
dH = 5403 Joules
find moles using molar mass
1.75 g Zn @ 65.3.9 g/mol = 0.02676 moles Zn
by the equation
Zn (s) & 2 HCl (aq) –> ZnCl2(aq) & H2 (g)
0.02676 moles Zn required twice as many moles of HCl
which was not added
HCl is the limiting reagent
by the equation
Zn (s) & 2 HCl (aq) –> ZnCl2(aq) & H2 (g)
.0375 mol HCl reacts with 1/2 as many moles of Zn = 0.01875 mol Zn react
5403 Joules / 0.01875 mol Zn react = 288 kJ/mol Zn
Duncan Hills Coffee
|
|
Keurig My K-Cup Reusable Coffee Filter $14.95 My K-Cup Reusable coffee filter – Use your own gourmet coffee in a reusable filter. Exclusive to the Keurig Home Brewing System…. |
|
|
Cuisinart DCC-1200PRC 12-Cup Replacement Carafe-Black $17.99 Cuisinart DCC-1200PRC 12-Cup Replacement Coffee Carafe… |
|
|
Cuisinart GR-4N 5-in-1 Griddler $185.00 The Cuisinart(tm) Griddler makes “multifunctional” an understatement! Make perfect panini… plus! With four separate cooking options, it can handle everything from pancakes to sausages to grilled cheese to steaks, hamburgers and panini. It helps you prepare more servings of more kinds of food in less time, so you can cook for a crowd — no one has to wait!Simply change the cooking plates and adju… |
|
|
Expanding PEG Rack 10 Hooks Hardwood Multi-purpose Vertical or Horizontal Wall Mount $1.87 This multi-purpose expanding rack just the thing you need for that room that needs a little extra space or organization. Its 10 pegs can hold coats, hats, mugs, pet leashes and more ! You can hang it vertically or horizontally-whatever meets your hanging needs best. It’s attractive natural wood construction with a clear lacquer finish matches many color schemes and decor…. |
|
|
COFFEE cup silhouette NIGHT LIGHT cappucino DECOR NEW $6.00 Coffee Cup Night-Light. Let this metal light perk up your room! The cut-out accents of a steaming hot cup of coffee can almost bring the aroma to the kitchen just by looking at it. Includes bulb. Base with on/off switch fits most outlets. 5″H…. |
|
|
Range Kleen Hallmark Design Set of Four Burner Kovers, Coffee $13.17 Range Kleen Coffee Hallmark Design Burner Kovers (Set of 4)… |
|
|
Cuisinart GTF Gold Tone Filter $0.01 Permanent gold-tone filter for use in the DCC-100, DCC-900, DCC-1000, DCC-1200, and DGB-300 series coffee makers by Cuisinart. … |
|
|
Medelco #4 Cone Permanent Coffee Filter $0.01 #4 Cone, 8-12 Cup, Golden, Basket Permanent Coffee Filter, Universally Designed To Fit Most Coffee Makers, Heat Treated Surgical Grade Stainless Steel Mesh Filter, Color Can Not Wear Off, Environmental Option To Disposable Paper Filters, Top Rack Dishwasher Safe, Unlike The More Expensive Alternatives, 5 Year Limited Warranty…. |
|
|
Fellowes Office Suites Large Monitor Riser, Black/Silver $35.99 Adjustable feet allow optimal height positioning&mdashviewing angle can be customized within a 2 1/2&rdquo range. Heavy-duty construction supports 21&rdquo monitors up to 80 lbs. Non-skid rubber feet protects worksurface from scratches or scuffs. Cup holder and media storage plus storage drawer keeps supplies and accessories always within reach. Stows laptop underneath when not in use for space-sa… |
|
|
USB Powered Beverage Coffee Warmer with 4 Port USB Hub $0.60 This USB Powered Beverage Warmer can keep your beverage, coffee or tea hot all morning long. Since it’s powered from your computer USB port it doesn’t require batteries! You’ll be able to keep your drink warm and a safe distance away from your valuable computer with the USB Powered Beverage Warmer’s 37.5 inch long USB cable. In addition to keeping your beverage warm, this amazing USB Powered Bev… |