The coinage of metals (Group 11) copper, silver, and gold have specific heats of 0.385, 0.233, and 0.129 J/g-K, respectively. Among this group, the specific heat capacity ____ and the molecular heat capacity ____ as the atomic weight increases.  (a) increases, increases  (b) increases, decreases  (c) decreases, increases (d) decreases, decreases

Please answer these questions on your Page 7 (a) We place 88.8 g of a metal at 10.00°C in 444.4 g of water at 70.00°C. The water is in a beaker that is also at 70.00°C. The specific heat capacity of water is 4.184 J K-¹ g-¹ and that of the metal is 0.555 J K-¹g-¹. The heat capacity of the beaker is 0.777 kJ K-¹. What is the final temperature of the metal, the water, and the beaker? (b) Calculate the enthalpy change for the reaction C(graphite) + 2 H₂(g) → CH₂(g) with the help of the enthalpy changes of the following reactions: C(graphite) + O₂(g) → CO2(g) AH= -393.5 kJmol-¹ H₂(g) + O₂(g) → H₂O(1) AH-285.8 kJmol-1 CH4(g) + 2 O₂(g) → CO2(g) + 2 H₂O(1) AH = -890.4 kJmol-¹ The temperature is 25°C in all instances.

1. When, a volume of 200 cm³ of Lithium hydroxide solution of concentration 1.00 mol/dm³ and 200 cm³ of Hydrochloric acid of concentration 100 mol/dm³ were mixed together in a calorimeter the reaction was investigated to be exothermic. a) Distinguish between endothermic and exothermic reactions. b) Based on the information given above in question one (1), calculated the enthalpy change per mol of water produced, if the heat capacity of the calorimeter was 76 J/K and the temperature rise was 5.25 K. (State any assumptions made)

A student runs two experiments with a constant-volume "bomb" calorimeter containing 1300. g of water (see sketch at right). thermometer stirrer First, a 5.000 g tablet of benzoic acid (C,H,CO,H) is put into the "bomb" and burned completely in an excess of water oxygen. (Benzoic acid is known to have a heat of combustion of 26.454 kJ/g.) The temperature of the water is insulation observed to rise from 23.00 °C to 43.76 °C over a time of 6.8 minutes. Next, 4.260 g of acetaldehyde (C,H,O); are put into the "bomb" and similarly completely burned in an excess of oxygen. This time the temperature of the water rises from 23.00 °C to 38.43 °C. chemical reaction "bomb" Use this information, and any other information you need from the ALEKS Data resource, to answer the questions below about this reaction: A "bomb" calorimeter. 2C,H,0(g) + 50,(g) → 4CO,(g) + 4 H,O(g) Be sure any of your answers that are calculated from measured data are rounded to the correct number of significant digits. Note…

E In a constant-pressure calorimeter, 70.0 mL of 0.300 M Ba(OH), was added to 70.0 mL of 0.600 M HCl. The reaction caused the temperature of the solution to rise from 23.98 °C to 28.07 °C. If the solution has the same density and BO specific heat as water (1.00 g/mL and 4.184J/g °C,) respectively), what is AH for this reaction (per mole H₂O produced)? Assume that the total volume is the sum of the individual volumes. AH = kJ/mol H₂O

A 25.0 mL portion of dilute HCl (aq) is combined with a 25.0 mL portion of dilute NaOH in a coffee-cup calorimeter. Both solutions are initially at a temperature of 23.3 ºC. The reaction produces enough heat to raise the final temperature of the 50.0 mL of liquid in the calorimeter to 26.8 ºC . What is qrxn in J?

Be sure to answer all parts. A 0.2975−g sample of solid magnesium is burned in a constant-volume bomb calorimeter that has a heat capacity of 3024 J/°C. The temperature increases by 2.437°C. (a) Calculate the heat associated with the burning Mg in kJ/g.     kJ/g (b) Calculate the heat associated with the burning of Mg in kJ/mol.

ch.10.

A 148 g sample of an unknown metal at 74.0 oC is placed in a beaker containing 80.0 g of H2O at 25 oC.  The final temperature of the metal sample and water is 32 oC.  cH2O(l) = 4.184 j/ g oC SHOW ALL WORK (a) What is the specific heat (c) of the metal?   (b) 5 common metals have the following specific heat capacities (c) [given in units of J/g oC] :    Aluminum: 0.921     Copper: 0.377        Gold: 0.126       Iron: 0.461      Nickel:  0.502   Your sample is most likely to be which metal?

Consider the data about gold metal in Exercise 5.26(b).(a) Based on the data, calculate the specific heat of Au(s).(b) Suppose that the same amount of heat is added to two10.0-g blocks of metal, both initially at the same temperature.One block is gold metal, and one is iron metal.Which block will have the greater rise in temperature afterthe addition of the heat? (c) What is the molar heat capacityof Au(s)?