A substance has a melting point of 20 degrees celsius and a heat of fusion of...

A substance has a melting point of 20 degrees celsius and a heat of fusion of 3.4*10^ 4 J/kg. The boiling point is 150 degrees celsius and heat vaporization is 6.8*10^ 4 J/kg at a pressure of one atmosphere. The specific heats for the solid,liquid and gaseous phases are 600 J/kg , 1000 and 400. How much heat is required to raise the temperature 1.90kg of this substance from -4 degrees celsius to 106 degrees celsius at a pressure of one atmosphere?

Expert Solution

genius_generous answered 2 years ago

For cyclohexane, C6H12, the normal melting point is 6.47°C and the heat of fusion at this...

For cyclohexane, C6H12, the normal melting point is 6.47°C and the heat of fusion at this temperature is 31.3 J/g. Find the freezing point of a solution of 110 mg of pentane, C5H12, in 16.45 g of cyclohexane. Assume an ideally dilute solution and that only pure cyclohexane freezes out.

Although gallium is a solid at STP, it had a low melting point (29.76 degrees Celsius)...

Although gallium is a solid at STP, it had a low melting point (29.76 degrees Celsius) and a liquid density of 5.9 g/cm^3. If liquid gallium is used as the barometric liquir instead of mercury, how far would Ga(l) travel up the column when the barometer is exposed to 1 atm pressure?

Melting point of ferrocene = 171.5-172.6 degrees Celcius Literature melting point of ferrocene = 172-174 degrees...

Melting point of ferrocene = 171.5-172.6 degrees Celcius Literature melting point of ferrocene = 172-174 degrees Celcius Melting point of acetylferrocene = 78.9-83.2 degrees Celcius Literature melting point = 81-81 degrees Celcius What do these melting points indicate about the purity and identity of the ferrocene and acetylferrocene samples?

Water has an unusually high specific heat, melting point, boiling point, and heat of vaporization as...

Water has an unusually high specific heat, melting point, boiling point, and heat of vaporization as compared to compounds of similar molar mass. Explain why. Please show all work with the correct answer. Thank you!!!!

A culture of bacteria growing at 45 degrees celsius was shifted to 20 degrees celsius. How...

A culture of bacteria growing at 45 degrees celsius was shifted to 20 degrees celsius. How would you expect this shift to alter the fatty acid composition of the membrane phospholipids. Explain.

For gallium that has a melting point of 29.76 assuming that heat is gained at a...

For gallium that has a melting point of 29.76 assuming that heat is gained at a rate of 1.0 J/sec, and the sample size is 10.0 g, calculate the heat of fusion for the material in kJ/mol. It reaches 29.7 at 250 seconds and stays constant until 550 seconds.

Calculate delta H for melting exactly 1 gram of ice at exactly 0 degrees Celsius and...

Calculate delta H for melting exactly 1 gram of ice at exactly 0 degrees Celsius and 1 atm. Find delta U for this same process. Data: Heat of fusion for water 334.77 J/g. The desity of ice at 0C is 0.9168 g/mL and the density of water at 0C is 0.99984 g/mL. Ans: from the calculation, you should conclude that to 4 significant figures, delta H and delta U are the same. This is because the P(delta V) is very...

The melting point (in degrees Fahrenheit) for a randomly selected tub of margarine of a certain...

The melting point (in degrees Fahrenheit) for a randomly selected tub of margarine of a certain brand is known to have a normal distribution with a SD, σ = 1.21. A sample of n = 5 tubs of margarine is drawn. The sample mean of melting temperature is computed to be ¯x = 95.3. (a) Construct a 95% confidence interval for the mean melting temperature. (b) Construct a 99% confidence interval for the mean melting temperature. Compare the width of...

The enthalpy of fusion for benzene is 127.34 kJ/kg, and its melting point is 5.49 Celcius....

The enthalpy of fusion for benzene is 127.34 kJ/kg, and its melting point is 5.49 Celcius. Estimate deltaG when 1.00 mole of benzene melts at 25 Celsius. The optionns are: A. 8.312kJ B. -0.696kJ C. 35.661 kJ D. -11.301 kJ

A) The substance sulfur dioxide has the following properties: normal melting point: 200.4 K normal boiling...

A) The substance sulfur dioxide has the following properties: normal melting point: 200.4 K normal boiling point: 263.1 K triple point: 1.7×10-3 atm, 197.6 K critical point: 78 atm, 430.7 K A sample of sulfur dioxide at a pressure of 1.00 atm and a temperature of 253.5 K is cooled at constant pressure to a temperature of 192.3 K. Which of the following are true? Choose all that apply The solid initially present will vaporize. The sample is initially a...

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