Applications For the meling For the melting of ammonia (NH3), AfusHo :65kJ/mol and AusS-28.9 J/mo...
Determine how much heat is needed to warm up 10.0 g of ammonia, NH3, from -50.0°C to 0.00°C. The table below lists information about ammonia that will help you solve the problem. Show all your work. Melting point = -77.73°C Boiling point = -33.4°C AHfus = 5.653 kJ/mol AHvaa = 23.35 kJ/mol Cn(liquid ) = 37.0 J/mol.K Cn(gas) = 80.8 J/mol-K
Glycerol, C3H2O3, has the following properties: molar mass = 92.09 g/mol melting point = 17.0°C boiling point = 287 °C AH fus = 18.3 kJ/mol AHvap = 91.7 kJ/mol Cs of C3H2O3(s) = 1.63 J/g °C Cs of C3H2O3(1) = 2.41 J/g °C How much energy is required to warm 25.2 g of C3H2O3(s), initially at -10.0°C, to C3H2O3(l) at 99.0 °C? A. 16.2 kJ C. 7.28 kJ B. 11.1kJ D. 2.93 kJ
A certain substance has a specific heat 1 J/(mole.K) and has melting point of 360 K. If one mole of substance is at 359 degrees how much energy must be added to melt it. a. Exactly 1 J b. Lesss than 1 Joule c. Greater than 1 joule d. Less than 0 J
How much heat energy is required to boil 14.8 g of ammonia, NH3? The molar heat of vaporization of ammonia is 23.4 kJ/mol.
1) if 6.85 of glucose( C6H12O6, molar mass=180.2 g/mol) is dissolved in 155g of chloroform( CHCL3,molar mass= 119.4 g/mol) , what is the boiling point of the solution. ( the boiling point of pure CHCl3 is 61.2 celsius, and Kb = 3.63 celsius/m for CHCl3) 2) a,) Liquid ammonia (boiling point = -33.4C) can be used as a refrigerant and heat transfer fluid. How much energy is needed to heat 25.0 g of NH3(l) from -65.0C to -12.0C? Heat of...
0 0 6. The melting point of NH3 is 195 K. The boiling point of NH3 is 240 K. In order to determine the amount of energy required to raise a certain quantity of NH3 from 200 K to 230 K, we need to use values of which thermal properties of NH3? a) heat of vaporization b) heat of fusion c) heat capacity of liquid ammonia d) heat capacity of ammonia vapor e) some two of the above types 7....
UNIVERSITY OF LIVERPOOL Question 4 (a) In Selective Laser Melting (SL.M) steel powder is deposited on a build platform and is melted by a fibre laser. Calculate the energy required to melt Icc of steel powder using the following quantities The density of steel The melting point of stecl Average specific heat capacity of steel The latent heat of fusion for steel Ambient temp Absorbtivity of the laser 7800kg/m' 1515°C 620 J/kg K 247 J/g 20°C 0.4 Given below are...
The molar enthalpy of vaporization of NH3 is 23.3 kJ/mol at its normal boiling point of -33.3 °C. How much energy is required to evaporate 2.03 kg of ammonia at -33.3 °C?
The change in enthalpy when 1 mol of ice is melted at 273K is 6008 J Heat Capacity of liquid water, Cp_{L} = 75.44 J/mol K Heat Capacity of solid water, Cp_{S} = 38J/mol K Enthalpy chage of melting at 273K, \Delta H_{273}=6008 J Calculate the standard enthalpy of fusion for ice. Calculate the heat released when 100 g of water supercooled at 250K solidify Initial T=25°C=298K Thanks
If the melting point of the substance is 70.°C, how much heat would be required to convert 1.0 mol of it from solid at 30.°C into liquid at 105°C? A substance has the following properties: AHfus = 20.0 kJ/mol AHvap = 10.0 kJ/mol Co (solid) = 60. J mol-- K-1 Cp (liquid) = 30. J mol-- K-1 Cp(gas) = 60. J mol-1 K-1