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how many grams of water (is=4.184 J/g degrees celcius) will release 1367 J of heat when cooled to 45.2 degrees celcius to 36.2 degrees Celsius
С = 4.184 J/(g*C) delta T = 9 C for m = 1 and delta t=9 it is 4.184*9=37.656 j for m=x and delta t =9 it is 1367/37.656 =...
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What phase changes, if any, occur if carbon dioxide initially at -80 degrees celsius and 8.0 atm is allowed to warm to -25 degrees celsius at 5.0 atm?
Using law PV = nRT, you can see, that if n,R = const, and T and P are used for some processes,V-volume is the one,that can be changed.
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If a sample of gas occupies 6.8 liters at 327 degrees celcius what is the volume at 27 degrees celcius if the pressure does not change?
This question can be solved using the ideal gas law: PV = nRT P is pressure V is volume n is amount R is gas constant = 8.31 T is...
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Calculate q, w, delta E and delta H for the process in which 2.0 moles of N2O gas are cooled from 165 degrees Celsius to 55 degrees Celsius at a constant pressure of 5 atm.
delta E=0 delta H = Cp delta T delta U = Cv delta T + p delta V q = delta H w = p delta V delta U =...
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Determine the new volume of a gas at that occpies an original volume of 55 L at 750mmHg and 25 degrees celsius if the pressure is changed to 1.03 atm and the temperature to 30 degrees celsius.
According to the ideal gas equation:P1V1/T1 = P2V2/T2,where P1, V1, T2 - initial pressure, volume and temperature, P2, V2, T2 - pressure, volume and temperatureAs a result:V2 = P1V1T2 /...
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Metal A melts at 800 degrees
Metal B melts at 194 degrees
Explain this in terms of bonding
The melting temperature depends on the strength of the crystal lattice, forms. When the kinetic energy of the vibrational motion of the crystal lattice sites converts the energy, the metal...
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A solute was added to 100 g of H2O and was found to have a solubility of 112 g at 25 degrees Celsius. What would be the solubility in 375 g of H2O at 25 degrees Celsius?
Solubility here is the amount of solute that is needed in order to reach saturated solution. If temperature remains constant then amount of solute is proportional to the amount of...
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What is the heat capacity of gold if a 250 g sample needs 133 cal of energy to increase its temperature from 23.0 degrees Celsius to 40.1 degrees Celsius
Q=c*m*(t2-t1); c=Q/[m*(t2-t1)]=133 cal/[0.25 kg*(40.1-23.0)C]=31.1 cal/(kg*C)
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112,300 joules heat is transferred when 240 g of a metal sample is cooled from 880 degrees celsius to 13 degrees celsius. What is the specific heat?
q = cmΔT => c = q / mΔT = 112300J / (240g x (880oC - 13oC)) = 0.54 J/goCAnswer: c = 0.54 J/goC
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A body kept in air with 25degree Celsius cools from 140 degree Celsius to 80 degree Celsius in 20 minutes. Find when body cools down to 35 degree Celsius.
According to Newton's law of cooling, mc(T1 - T2)/t = k [(T1 +T2)/2 - T0)] ---------------(1) mc/k = [(T1 +T2)/2 - T0)]/[(T1 - T2)/t] mc/k= [(140+80)/2 - 35)]/[(140 -80)/25] =75/2.4 SubstitutingT1 = 140 and T2 = 80 and T0 = 25 (all in °C) in Eq. (1),weget mc (140 - 80)/t = k [(140+...
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