SOLVED

11) Which of the following substances (with specific heat capacity provided) would show the greatest temperature change upon absorbing 100.0 J of heat? A) 10.0 g Cu, CCu = 0.385 J/g°C B) 10.0 g H2O, = 4.18 J/g°C C) 10.0 g ethanol, Cethanol = 2.42 J/g°C D) 10.0 g Al, CAl = 0.903 J/g°C E) 10.0 g Pb, CPb= 0.128 J/g°C 12) A balloon is inflated from 0.0100 L to 0.400 L against an external pressure of 10.00 atm. How much work is done in joules? 101.3 J = 1 L × atm A) -39.5 J B) 39.5 J C) 0.395 J D) -0.395 J E) -395 J 13) A piece of iron (C=0.449 J/g°C) and a piece of gold (C=0.128 J/g°C) have identical masses. If the iron has an initial temperature of 488 K and the gold has an initial temperature of 308 K, which of the following statements is true of the outcome when the two metals are placed in contact with one another? Assume no heat is lost to the surroundings. A) Since the two metals have the same mass, the final temperature of the two metals will be 398 K, exactly halfway between the two initial temperatures. B) Since the two metals have the same mass, but the specific heat capacity of gold is much smaller than that of iron, the final temperature of the two metals will be closer to 308 K than to 488 K. C) Energy will flow from the gold to the iron until the two metals are at the same temperature. D) Since the two metals have the same mass, the thermal energy contained in each metal after equilibrium will be the same. E) None of the above are true. 14) Calculate the amount of heat (in kJ) required to raise the temperature of a 79.0 g sample of ethanol from 298.0 K to 385.0 K. The specific heat capacity of ethanol is 2.42 J/g°C. A) 57.0 kJ B) 16.6 kJ C) 73.6 kJ D) 28.4 kJ E) 12.9 kJ 15) Calculate the amount of heat (in kJ) necessary to raise the temperature of 53.8 g benzene by 50.6 K. The specific heat capacity of benzene is 1.05 J/g°C. A) 1.61 kJ B) 16.6 kJ C) 2.59 kJ D) 2.86 kJ E) 3.85 kJ 16) The specific heat capacity of liquid mercury is 0.14 J/gK. How many joules of heat are needed to raise the temperature of 5.00 g of mercury from 15.0°C to 36.5°C? A) 7.7 × 102 J B) 15 J C) 36 J D) 0.0013 J E) 1.7 J 17) The specific heat capacity of solid copper metal is 0.385 J/gK. How many joules of heat are needed to raise the temperature of a 1.55-kg block of copper from 33.0°C to 77.5°C? A) 1.79 × J B) 26.6 J C) 2.66 × J D) 5.58 × J E) 0.00558 J 18) A 5.00-g sample of liquid water at 25.0 C is heated by the addition of 84.0 J of energy. The final temperature of the water is ________°C. The specific heat capacity of liquid water is A) 95.2 B) 25.2 C) -21.0 D) 29.0 E) 4.02 19) A 6.50-g sample of copper metal at 25.0°C is heated by the addition of 84.0 J of energy. The final temperature of the copper is ________°C. The specific heat capacity of copper is A) 29.9 B) 25.0 C) 9.0 D) 59.0 E) 34.0 20) The specific heat capacity of liquid water is 4.18 J/g-K. How many joules of heat are needed to raise the temperature of 5.00 g of water from 25.1°C to 65.3°C? A) 48.1 J B) 840 J C) 1.89 × J D) 2.08 × J E) 54.4 J