2NO(g)+O2(g)---->2NO2(g) Change of heat=-114.6 kJmol. A sheet of gold weighing 10.0g and at a temperature of 18.0 degreesC is placed flat on a sheet of iron weighing 20.0g and at a temperature of 55.6 degreesC. What is the final temperature of the combining metals? Assume that no heat is lost to the surroundings. Nov 11, 2014 · A sheet of gold weighing 14.0 g and at a temperature of 18.9°C is placed flat on a sheet of iron weighing 20.3 g and at a temperature of 51.2°C. What is the final temperature of the combined metals?

Nov 28, 2008 · 3.) A sheet of gold weighing 10.0 g and at a temperature of 18.0 oC is placed flat on a sheet of iron weighing 20.0 g and at a temperature of 55.6 oC. What is the final temperature of the combined metals? (Assume that no heat is lost to the surroundings). 4.) Consider the reaction of hydrochloric acid with magnesium. a. 6. A sheet of gold weighing 10.0 g and at a temperature of 18.0 ° C is placed flat on a sheet of iron weighing 20.0 g and at a temperature of 55.6 ° C. What is the final temperature of the combined metals? Assume that no heat is lost to the surroundings. (Hint: The heat gained by gold must be equal to the heat lost by iron.)