How much energy (in kJ) is required to heat 15.98 g of Ga(s) from 29.8 K (its melting point) to 1366.8 K. The heat of fusion of Ga is 5.59 kJ/mol and the molar heat capacity of liquid Ga is 25.87J/mol*K. a) 38.54 kJ b) 150.9 kJ c) 7.928 kJ d) 9.208 kJ

How much thermal energy/heat is required to raise 2.3 kg of lead from 300°C to 1800°C? Use Table 1 p281 and Table 1 p291 to help you. O 1.8 x 10°J O 2. 5 x 10°J O8.2 x 10³J O4.5 x 10°J x 10°J

How many grams of coffee must evaporate from 700 g of coffee in a 190 g glass cup to cool the coffee and the cup from 95.0°C to 24.0°C? Assume the coffee has the same thermal properties as water and that the average heat of vaporization is 2,340 kJ/kg (560 cal/g). Neglect heat losses through processes other than evaporation, as well as the change in mass of the coffee as it cools. g Do the latter two assumptions cause your answer to be higher or lower than the true answer? O My answer is lower than the true answer because, if coffee loses heat in other ways and its mass decreases, it will need more evaporation for the same temperature drop. O My answer is higher than the true answer because, if coffee loses heat in other ways and its mass decreases, it will need less evaporation for the same temperature drop. O My answer is higher than the true answer because, if coffee loses heat in other ways and its mass decreases, it will need more evaporation for the same temperature drop. O My…

1) A Sample Of Water That Weigh 25g Absorbs 880J Of Energy. The Water Is Initially At 38.0 'C. What Is The New Temperature Of The Water In Degrees Fahrenheit? 2) A Sample Of Metal, Heated To 110'C, Is Placed Into A Calorimeter Containing 140g Of Water At 15.0'C. The Final Temperature Of The Metal And Water Is 28.0'C. What Is The Mass Of The Metal (m Metal)? Water Q= Cs= 4.184 M = Tfinal F Tinitial = AT = Metal Q= Cs= 0.628 M= Tfinal Tinitial = AT =