141 Answered Questions for the topic thermodynamics

18d

100 g of ice at 0 ºC is added to an insulated chamber containing 20 g of steam at 100 ºC. What is the final temperature of the 120 g of water

I began by saying the following: Qabsorbed by ice=Qreleased by steam ... more
Thermodynamics Physical Chemistry

12/18/20

Help please ASAP!

A sample consisting of 2.0 mol CO2 occupies a fixed volume of 15.0 dm3at 300 K. When it is supplied with 2.35 kJ of energy as heat its temperature increases to 341 K. Assuming that CO2 is described... more
Thermodynamics Science Chemistry

12/14/20

I'm very confused about this please help! (Hess Law)

Using the equations 2 C₆H₆ (l) + 15 O₂ (g) → 12 CO₂ (g) + 6 H₂O (g)∆H° = -6271 kJ/mol 2 H₂ (g) + O₂ (g) → 2 H₂O (g) ∆H° = -483.6 kJ/mol C (s) + O₂ (g) → CO₂ (g) ∆H° = -393.5 kJ/mol Determine the... more
Thermodynamics Chemistry

12/14/20

I really need help with this fast!

Using the equations H₂ (g) + F₂ (g) → 2 HF (g) ∆H° = -79.2 kJ/mol C (s) + 2 F₂ (g) → CF₄ (g) ∆H° = 141.3 kJ/mol 2 C(s) + 2 H₂ (g) → C₂H₄ (g) ∆H° = -97.6 kJ/mol Determine the enthalpy (in kJ/mol)... more
Thermodynamics Chemistry

11/20/20

chemistry/calorimetry (please help if you can)

A generic solid, X, has a molar mass of  69.6 g/mol. In a constant‑pressure calorimeter, 18.8 g of X is dissolved in 401 g of water at 23.00 °C.X(s) → X (aq) The temperature of the resulting... more
Thermodynamics Chemistry Chem

11/20/20

thermochemistry problem (please help if u can!)

When 0.467 g of sodium metal is added to an excess of hydrochloric acid, 4950 J of heat are produced. What is the enthalpy of the reaction as written?2Na (s) + 2 HCL (aq) → 2NaCL (aq) + H2 (g)
Thermodynamics Science Chemistry

11/20/20

calorimetry / thermodynamics problem

Potassium nitrate, KNO3, has a molar mass of 101.1 g/mol. In a constant-pressure calorimeter,  26.5g of KNO3 is dissolved in 243 g of water at 23.00ºC.KNO3 (s) → K+ (aq) + NO3- (aq)The temperature... more
Thermodynamics Chemistry

11/20/20

calorimetry / thermodynamics problem

1 a. Assume that it is possible to heat water with perfect insulation (all the heat from combustion of ethanol is transferred to water).How much energy (in joules) is needed to heat 200.0 g of... more
Thermodynamics Chemistry

11/20/20

Calorimetry/Thermodynamics problem. Please help if you can!

If you have 0.266 m3 of water at 25°C in an insulated container and add 0.112 m3 of water at 95°C, what is the final temperature Tf of the mixture? Use 1000 kg/m3 as the density of water at... more
Thermodynamics Chemistry

10/19/20

Thermodynamic Question in Description

Question: A coffee cup calorimeter contains water at an initial temperature of 20 °C and is calculated to have a calorimeter constant (heat capacity) of 75 J/°C. A 28 g piece of an unknown metal is... more
Thermodynamics Chemistry Gas Laws

10/19/20

If 33.6 g of NO and 26.9 g of O2 react together, what is the mass in grams of NO2 that can be formed via the reaction below?

2 NO (g) + O (g) → 2 NO (g) Second Question: What volume of NO2 could be isolated at 945 mbar and 28 °C?
Thermodynamics Chemistry

10/19/20

Question about thermodynamics, it's too long to add here so its in the description.

Question: At 100 °C, 1.00 gram of liquid water has a volume of 1.043 mL. What volume will 1.00 gram of water vapor occupy at 100 °C at a pressure of 1.00 bar? What is the percent volume change in... more
Thermodynamics Chemistry

10/12/20

Mean bond enthalpies: C=C 612kJ/mol, C-C 348 kJ/mol, C-HkJ/mol, H-H 436kJ/mol, C(s) —> C(g) 715kJ/mol

Mean bond enthalpies: C=C 612kJ/mol, C-C 348 kJ/mol, C-HkJ/mol, H-H 436kJ/mol, C(s) —> C(g) 715kJ/mol1 - Calculate the enthalpy change for the dimerisation of ethene to give cyclobutane2 C2H4(g)... more
Thermodynamics Chemistry

10/11/20

The question is in the description.

The standard enthalpy of formation of H2O (l) is -286 kJ/mol and the standard enthalpy of combustion of ethane is -1560 kJ/mol. Given that the enthalpy change when one mole of ethene is redcued by... more
Thermodynamics Chemistry

10/11/20

A calormeter has a mass of 200g and a specific heat capacity of 0.420 J g-¹. Into it are put 50.0 cm³ of 1.25 mol dm-³ hydrochloric acid and 50.0cm³ of 1.25 mol dm-³ potassium hydroxide solution at...

A calormeter has a mass of 200g and a specific heat capacity of 0.420 J g-¹. Into it are put 50.0 cm³ of 1.25 mol dm-³ hydrochloric acid and 50.0cm³ of 1.25 mol dm-³ potassium hydroxide solution at... more
Thermodynamics Chemistry

10/11/20

The standard enthalpy of formation of H2O (l) is -286 kJ/mol and the standard enthalpy of combustion of ethane is -1560 kJ/mol. Given that the enthalpy change when one mole of...

The standard enthalpy of formation of H2O (l) is -286 kJ/mol and the standard enthalpy of combustion of ethane is -1560 kJ/mol. Given that the enthalpy change when one mole of ethene is redcued by... more
Thermodynamics Mechanical Engineering

10/08/20

Final year project

hi I'm just starting my final year and have to complete a final year project. I'm trying to think of some ideas at the moment I have one or two to do with solar power but I am struggling to think... more
Thermodynamics Physics

10/03/20

Thermodynamics Question

A reservoir contains 2.83 cu. m of carbon monoxide at 6895 kPa and 23.6 degrees celsius. An evacuated tank is filled from the reservoir to a pressure of 3497 kPa and a temperature of 12.4 degrees... more
Thermodynamics Chemistry

09/25/20

Hess' Law chemistry

Given the following equationsH2(g) + 1/2 O2(g)  H2O(l)      ΔH = -285.8 kJN2O5(g) + H2O(l)  2 HNO3(l)      ΔH = -76.6 kJ1/2 N2(g) + 3/2 O2(g) + 1/2 H2(g)  HNO3(l)      ΔH = -174.1 kJCalculate... more
Thermodynamics Science Chemistry

09/16/20

How many joules of heat are needed to raise the temperature of 10.0 g of aluminum from 22°C to 55°C, if the specific heat of aluminum is 0.90 J/g°C?

How many joules of heat are needed to raise the temperature of 10.0 g of aluminum from 22°C to 55°C, if the specific heat of aluminum is 0.90 J/g°C?
Thermodynamics Physics

09/11/20

Charge cost question

Suppose you get a new Samsung Galaxy S20 to take advantage of the new 5G network. Unfortunately, when you receive it, the 4000mAh battery is “dead”. Assume that the overall charging efficiency is... more
Thermodynamics Physics

09/11/20

Wind Turbine Question

Suppose you own land which is on a mountain. You notice that at the top elevation of your property there is light and steady wind. You measure the wind with anemometer over the course of weeks and... more

07/04/20

Thermochemistry Problem

When 125 mL of 0.220 M NaCl(aq) and 125 mL of 0.220 M AgNO3(aq), both at 21.6°C, are mixed in a coffee cup calorimeter, the temperature of the mixture increases to 24.3°C as solid AgCl... more
Thermodynamics Microbiology Cello

06/14/20

Does living cells defy the 2​ law of thermodynamics?

Synthesis of protein molecules from the amino acids reduces randomness inside the cells. Does living cells defy the 2​ law of thermodynamics?
Thermodynamics Chemistry Ap Chemistry

05/13/20

Thermochemistry practice problem

A 5.00-g sample of aluminum pellets (specific heat capacity "0.89 J/'C ! g) and a 10.00-g sample of iron pellets (specific heatcapacity " 0.45 J/'C ! g) are heated to 100.0'C. The mixtureof hot... more

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