Some properties of potassium metal are summarized below: Normal melting point 63.5 °C Normal boiling point 765.7 °C Molar heat of fusion 2.334 kJ/mol Molar heat of vaporization 79.87 kJ/mol Specific heat of the solid 0.75 J/g °C a. Calculate the quantity of heat required to heat 6.08 g of potassium from 23.5 °C to 41.3 °C, in Joules. Heat J b. Calculate the quantity of heat required to melt 1.25 moles of potassium at its normal melting point, in kl. Heat = kj c. Calculate the quantity of heat required to vaporize 3.48 g of potassium at its normal boiling point, in kj. Heat = kj

Some properties of potassium metal are summarized below: Normal melting point 63.5 °C Normal boiling point 765.7 °C Molar heat of fusion 2.334 kJ/mol Molar heat of vaporization 79.87 kJ/mol Specific heat of the solid 0.75 J/g °C a. Calculate the quantity of heat required to heat 6.08 g of potassium from 23.5 °C to 41.3 °C, in Joules. Heat J b. Calculate the quantity of heat required to melt 1.25 moles of potassium at its normal melting point, in kl. Heat = kj c. Calculate the quantity of heat required to vaporize 3.48 g of potassium at its normal boiling point, in kj. Heat = kj

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

Match the following properties with the correct type of solid. > > melts at moderate (100- 600°C) temperatures to give a conducting liquid are very hard solids that do dissolve readily in H₂O melts below 100°C to give a non-conducting liquid conduct electricity as a solid 1. Metallic solid 2. Covalent network solid 3. Covalent solid 4. lonic compound
Calculate the heat energy released when 22.1 g of liquid mercury at 25.00 °C is converted to solid mercury at its melting point. Constants for mercury at 1 atm 28.0 heat capacity of Hg(1) melting point enthalpy of fusion J/(mol-K) 234.32 K 2.29 kJ/mol 4p= kJ
A 5.00 g sample of water vapor, initially at 155*C is cooled at atmospheric pressure, producing ice at -55*C. Calculate the amount of heat energy lost by the water vapor sample in this process, in kJ. Use the following data specific heat capacity of ice is 2.09 J/ gK; the specific heat capacity of liquid water is 4.18 J/ gK; the specific heat capacity of water vapor is 1.84 J/ gK; the heat of fusion of ice is 336 J/g; the heat of vaporization of water is 2260 J/g. ( I know the answer is 15.6 kJ but I don't know how to get to it, Pls help ASAP!!)show all the steps you can pls
carbon disulfide Cs2 has a heat of vaporization of 29,200 J/mol. at 268 K it has a vapor pressure of 1.0 X 10^2 mmHg. what is its vapor pressure at 301 K
1. Freon-12 (CCl2F2) is banned as a refrigerant because it is harmful to the ozone. a. Sketch the phase diagram of CCl2F2 using the physical constants below Normal boiling point = -29.8 °C Normal melting point = -158 °C Critical temperature = 112 °C Critical pressure = 40.8 atm Triple point (2.42 ×10-6 atm, -157 °C) b. Calculate the heat required to bring 10.0g CCl2F2 from -29.8 °C as a liquid to the gas phase at 10.0 °C. (molar mass 120.91 g/mol) Cs (gas) = 0.074 kJ/mol·K AHvap = 20.1 kJ/mol AHfus = 4.14 kJ/mol
Substance X is known to exist at 1 atm in the solid, liquid, or vapor phase, depending on the temperature. Additionally, the values of these other properties of X have been determined: melting point enthalpy of fusion - 10. °C boiling point 4.00 kJ/mol enthalpy of vaporization 30. °C 39.00 kJ/mol 3 1.60 g/cm³ (solid) 1 1 density 44. J.K ·mol (solid) 1.30 g/mL (liquid) 1 -1 heat capacity 64. J.K ·mol (liquid) 1 1 54. J.K mol (vapor) You may also assume X behaves as an ideal gas in the vapor phase. Suppose a small sample of X at -50 °C is put into an evacuated flask and heated at a constant rate until 10.0 kJ/mol of heat has been added to the sample. Graph the temperature of the sample that would be observed during this experiment. temperature (°C) 50- 40 30. 20 10. -10 -20 -30 -40 -50 0 1 2 3 4 5 6 7 8 9 10 heat added (kJ/mol) ☑ ? 00. 18 Ar
How much heat energy in kJ must be added to completely vaporize 1.00 L of water if the initial temperature is 30.0 oC? Assume the final temperature is 100.0 oC. The heat of vaporization of water AHvap = 40.7 kJ/mol and the c for liquid water is 4.18 J/g-oC.
Consider the following data for an unknown substance X: AHvap 19.00 kJ/mol Specific heat capacity of liquid = 2.10 J/g °C Boiling point = 66.0°C Molar mass = 119.0 g/mol When the temperature of 1.000 mole of X(g) is lowered from 91.0°C to form X(1) at 41.0°C, 30.38 kJ of heat is released. Calculate the specific heat сараcity of X(g). Specific heat capacity = J/g °C Submit Answer Try Another Version 10 item attempts remaining 11 33°F 12 Tch
How much energy (kJ) would be required to convert 17.33 g of Pb(s) at its freezing point (327.5 Â°C) to the boiling point (1740 Â°C) and then to completely vaporize it? Thermodynamic quantity Value Heat capacity 26.73 J/g*Â°C Heat of fusion 4.774 kJ/mol Heat of vaporization 195.6 kJ/mol