Mercury (Hg) is a metal that melts at –39 oC, and thus is a liquid for...

Mercury (Hg) is a metal that melts at –39 oC, and thus is a liquid for temperatures where water is liquid.

The latent heat of melting of mercury and specific heat of liquid mercury are: 1.84 kg of solid mercury at its melting point of –39 oC is placed in thermal contact with 1.17 kg of water, initially at 20 oC, such that they are thermally isolated from everything else.

What is the final temperature of the system? Give your answer in oC to at least three digits.

Solutions

Expert Solution

By the principle of calorimetry, the total heat gained by mercury is equal to the total heat released by water.

Let the final temperature of the system be T

Heat absorbed by mercury will be utilized to change its state by latent heat for melting and to raise its final temperature to T

m is the mass, L is the latent heat and s is the specific heat

Amount of heat released by water is

Latent heat of melting of mercury is

Specific heat of mercury is

And that of water is

So, we must have

This is the final temperature of the system.

genius_generous answered 1 week ago

Next > < Previous

Related Solutions

Naphthalene, C10 H8 , melts at 80∘ C . If the vapor pressure of the liquid...

Naphthalene, C10 H8 , melts at 80∘ C . If the vapor pressure of the liquid is 10 mm at 85.8∘C and 40 mm at 119.3∘C , and that of the solid is 1mm at 52.6∘C , calculate a) Assuming the melting-point and triple-point temperatures are the same, calculate △H sublimation of the solid, and △H fusion .

On plant Mercury there is a special lake with two layers: dH2O and dHg (liquid mercury)....

On plant Mercury there is a special lake with two layers: dH2O and dHg (liquid mercury). The liquid water layer floats on top of the liquid mercury layer. Let ρH2O and ρHg denote the densities of water and mercury respectively. The gravitational field near the planet’s surface is gy, and the the atmospheric pressure near the surface of the lake P0. a.Determine an expression in terms of the gi variables for the pressure in the lake as a function of...

Why are heavy metals such as mercury (Hg) or lead (Pb) poisonous or toxic to living...

Why are heavy metals such as mercury (Hg) or lead (Pb) poisonous or toxic to living things? (You are not being asked here what harmful effects they have in the body- you are being asked why they have these effects?)

Pure oxygen was first made by heating mercury(II) oxide: HgO→Hg+O2Unbalance. 1) How many grams of mercury...

Pure oxygen was first made by heating mercury(II) oxide: HgO→Hg+O2Unbalance. 1) How many grams of mercury are formed from 46.5 g of HgO? 2) How many grams of oxygen are formed from 46.5 g of HgO? 3) How many grams of HgO would you need to obtain 33.3 g of O2?

A galvanic cell consists of a mercury (Hg) electrode immersed in 0.26 L of 0.105 M...

A galvanic cell consists of a mercury (Hg) electrode immersed in 0.26 L of 0.105 M Hg2+ solution and a silver (Ag) electrode immersed in 0.74 L of 1.44 M Ag+ solution. The galvanic cell is allowed to discharge at 25 °C until equilibrium is reached. What is the concentration of Hg2+ at equilibrium? Data: E° (V) Hg2+ + 2 e− → Hg(l) 0.854 Ag+ + e− → Ag(s) 0.800 Round your answer to two significant figures.

1) Mercury (Hg) can be used in a barometer to measure air pressure, based on how...

1) Mercury (Hg) can be used in a barometer to measure air pressure, based on how tall a column of mercury can be supported by the pressure of the atmosphere or another gas sample. The barometric reading taken at Skyline College on a specific day was 743.8 mm Hg. If the interior circumference of the tube holding the mercury is 9.82 mm, what is the mass of mercury in the tube (above the pool of mercury)? The column may be...

Total mercury (Hg) concentrations in the San Francisco Bay Area are reported to be 1.25 ng/L...

Total mercury (Hg) concentrations in the San Francisco Bay Area are reported to be 1.25 ng/L in water, 8 mg/L in rain, 2.1 mg/m3 in air, and 250 ng in 1 g of dry sediment. Report all these concentrations in ppt. Assume the air temperature is 20○C, atmospheric pressure is 1 atm, and Hg in air is in gaseous form. [Note: MWHg = 200 g/mole

The following information is given for mercury, Hg, at 1atm: boiling point = 357 °C Hvap(357...

The following information is given for mercury, Hg, at 1atm: boiling point = 357 °C Hvap(357 °C) = 59.3 kJ/mol specific heat liquid = 0.139 J/g°C At a pressure of 1 atm, what is H in kJ for the process of condensing a 46.3 g sample of gaseous mercury at its normal boiling point of 357 °C. kJ The following information is given for ether, C2H5OC2H5, at 1atm: boiling point = 34.6 °C Hvap(34.6 °C) = 26.5 kJ/mol specific heat...

1. A 30 g piece of metal (160.9 g/mol) melts at 1,560°C and its enthalpy of...

1. A 30 g piece of metal (160.9 g/mol) melts at 1,560°C and its enthalpy of fusion is 12.6 kJ/mol. Calculate the entropy of fusion (J/k) per mole of the metal. 2. The temperature of a 374 g piece of granite is increased from 38.4°C to 62.6°C. What is its change in entropy (J/K)? The specific heat capacity of granite is 0.790 J/g.K.

Solid HgO, liquid Hg, and gaseous O2 are placed in a glass bulb and the reaction...

Solid HgO, liquid Hg, and gaseous O2 are placed in a glass bulb and the reaction below is allowed to reach equilibrium. 2HgO(s) 2Hg(l) + O2(g); ΔH = +181.6 kJ With the system at equilibrium, the amount of Hg(l) in the bulb can be increased- A) by removing some HgO(s). B) by adding an inert gas. C) by adding some HgO(s). D) by increasing the pressure. E) by increasing the temperature.

Subjects