Question 7c of 38 Consider light with a wavelength of 5.75 x 10-10 m. How much...
Assuming that radiation with a wavelength = 15.0 cm is used, that all the energy is converted to heat, and that 4.184 J is needed to raise the temperature of 1.00 g of water by 1.00 degree celcius, how many photons are necessary to raise the temperature of a 350 mL cup of water from 25 degree C to 95 degree C?
Water has a specific heat of 4.184 j/g-"C. if 300.0 grams of water absorb 2.50 x 10 J of energy, how much will the temperature change? 3.50x 1040= 5. 200.0gx 4.164-ATr
At 1 atm, how much energy is required to heat 75.0 g of H2O(s) at –22.0 °C to H2O(g) at 145.0 °C? Helpful constants can be found here. Quantity per gram per mole Enthalpy of fusion 333.6 J/g 6010. J/mol Enthalpy of vaporization 2257 J/g 40660 J/mol Specific heat of solid H2O (ice) 2.087 J/(g·°C) * 37.60 J/(mol·°C) * Specific heat of liquid H2O (water) 4.184 J/(g·°C) * 75.37 J/(mol·°C) * Specific heat of gaseous H2O (steam) 2.000 J/(g·°C) *...
At 1 atm, how much energy is required to heat 81.0 g of H2O(s) at –20.0 °C to H2O(g) at 149.0 °C? Helpful constants can be found here. These are the helpful constants: Quantity per gram per mole Enthalpy of fusion 333.6 J/g 6010. J/mol Enthalpy of vaporization 2257 J/g 40660 J/mol Specific heat of solid H2O (ice) 2.087 J/(g·°C) * 37.60 J/(mol·°C) * Specific heat of liquid H2O (water) 4.184 J/(g·°C) * 75.37 J/(mol·°C) * Specific heat of gaseous...
How much heat is required to vapourize 50g of liquid water at 40 C to steam at 120 C? c (H2O, I) = 4.184 J g-1 C-1 c (H2O, g) = 2.080 j g-1 C-1 A) 50.7 KJ B) 107 KJ C) 217 KJ D) 127 KJ E) 89.7 KJ
1. Consider the following reaction. AH=+90.7 kj a. Is heat absorbed or evolved in the course of this reaction? b. Calculate the amount of heat (g) transferred (in k) when 1.60 g of CH,OH are decomposed by this reaction. 2. A sample of silver and a sample of water with equal masses undergo a temperature change. a. The heat capacity of silver is 0.24 J/g. C. How much energy (as heat) is required to raise the temperature of 300.0 g...
At 1 atm, how much energy is required to heat 43.0 g H2O(s)43.0 g H2O(s) at −14.0 ∘C−14.0 ∘C to H2O(g)H2O(g) at 121.0 ∘C?121.0 ∘C? Use the heat transfer constants found in this table. Quantity per gram per mole Enthalpy of fusion 333.6 J/g 6010. J/mol Enthalpy of vaporization 2257 J/g 40660 J/mol Specific heat of solid H2O (ice) 2.087 J/(g·°C) * 37.60 J/(mol·°C) * Specific heat of liquid H2O (water) 4.184 J/(g·°C) * 75.37 J/(mol·°C) * Specific heat of gaseous H2O...
At 1 atm, how much energy is required to heat 73.0 g H2O(s)73.0 g H2O(s) at −14.0 ∘C−14.0 ∘C to H2O(g)H2O(g) at 159.0 ∘C?159.0 ∘C? Use the heat transfer constants found in this table. Heat-transfer constants for H2O at 1 atm Quantity per gram per mole Enthalpy of fusion 333.6 J/g 6010. J/mol Enthalpy of vaporization 2257 J/g 40660 J/mol Specific heat of solid H2O (ice) 2.087 J/(g·°C) * 37.60 J/(mol·°C) * Specific heat of liquid H2O (water) 4.184 J/(g·°C)...
Determination of Specific Heat of Metals: (8 points) Ametal rod with a mass of 50.0 g was heated to 100°C in boiling water for 10 minutes and then placed into a cup of water containing 40 mL of water at 22.5 C. The temperature increased to a maximum of 34.4'C. The specific heat of water (Cp) is 4.184 J/g K and q = mx CP X AT a). How much heat (in Joules) was gained by the water? b). How...
How much heat in kJ gets rid of condensing 7.13 g of water vapor at 100 ° C and then cools the water formed to 25 ° C? [ΔHvap = 40.7 kJ / mol at 100 ° C and the natural heat of water c (H2O (l)) = 4.18 J g-1 ° C-1] Note. look up the units in the calculations and give the answer in kJ