Question

The following information is given for lead at 1 atm AHvap (1740.00°C) 858.2 J/g AHfus (328.00°C) 23.00 J/g Tb 1740.00°C Tm 328.00°C Specific heat solid 0.1300 J/g °C Specific heat liquid = 0.1380 J/g °C A 42.40 g sample of solid lead is initially at 304.00°C. If 1.548 x 103 Jof heat are added to the sample at constant pressure (P which of the following is are true? 1 atm) (Select all that apply) The sample is at a temperature of 328.00°C. The sample is at a temperature greater than 328.00°C. The sample is a solid in equilibrium with liquid. The sample is a solid. The sample is a liquid

Answer 1

Zient: Amount of Heat Alwebech Releanod, - q = ms. of where in is the mass of the substance s is specific Heat AF is Temperature difference . teat Absorbed by 4229g. Slithead at sose to increase its temperature to 320°c, it's Melting Point =424* 04/300 (828-304) = 1132:22 J7 ² Heat Absorked by Lead at its Melting Point 328°C, for Fusion = Mass x Enthalpy of Fusion (Attfer) = 424x23 = [9752J Heat Absorbed by Liquid Lead to increase its Temperature pre - 3286 to 1740 its Boiling Point =42+420: 1330-(1740–328) 826)-89 So, Total Heat Required for increasing the Temperature of 42e4g of Load, Arome 304 to 1740*4 = 132:29 +975.278261-89 = 19369-38 Tť But According to the question, 1548 of Heat is supplied. So, 4249. Lead will be at Molten State, but it's temperature will be very home than it's Boiling Point, 1740°c, because (75•2+ 13229) =1107-497154869369- Hence, the Corred Options of the Answer will be The Sample is at a temperature greater than 128 a The Sample is a liquid

1000ZJA from 72°c to Core 2 4 69501( 18 %=2741-45. I hon helende na migof Liquid Antimary to decrease it's temperatura * Heat Relosed by stry of Antimony at ila Molting Point, caic, for Frospinge MI610 Concom) 17068-4 J - 7 Hont Paleoved by 449.Solid Antimony, to decrease it's temperature • from baie to age - 44x 0.2091 (0631-26) = (5563-58 of Heat Rolomed by ung of Antimony to cool : = 99045 +7088-4 +5563°58 = 13613-43.5 = 13:64 kJ So, Energy - 1060 [13:64 kJ