3. Diamond is an allotrope of the element carbon. The enthalpy of combustion for diamond is -395.4 kJ/mol. What is the enthalpy of combustion in units of kilocalories per gram?

Q: If 1101 J of heat is available, what is the mass in grams of iron (specific heat = 0.450 J/g•°C)…

A: HEAT ENERGY: When the atoms present in a compound which can be a solid, liquid or a gaseous molecule…

Q: The specific heat of lead is 0.129 J/g C°. How many joules of heat are required to raise the…

A: Specific heat capacity of lead: 0.129J/g°CTinitial = 22°CTfinal = 37°Cmass of lead = 380g

Q: a 72.2g piece of metal at 84.0 C is placed in 137g of water at 21.0C contained in a calorimeter. the…

A:

Q: A 55.0 g piece of metal is heated in boiling water to 99.8 0 C and then dropped into cool water in…

A:

Q: A chunk of iron at 90.6°C was added to 200.0 g of water at 15.5°C. The specific heat of iron is…

A: Given: Mass of water = 200.0 g. Initial temperature of water = 15.5 oC Final temperature of mixture…

Q: A chemist placed a 1.195 g sample of fuel in a bomb calorimeter which was immersed into 2.00 L of…

A: The mass of the fuel sample is = 1.195 g The increase in the temperature of the water is = 20.1oC to…

Q: 2. A system performs 3.63 kJ of work and gives off 8.98 kJ of heat. What is the change in energy of…

A: To solve this problem we will use First Law of Thermodynamics  .  According to this law  ∆E = q + w…

Q: A 25.64g sample of solid was heated in a test tube to 100 degrees Celcius in boiling water and…

A: Given:Mass of sample = 25.64gT = 100o CMass of water = 50 gTemperature increased from 25.10 degrees…

Q: a system has 63.5 J of heat added to it, and the system does 75.5 J of work on its surroundings,…

A:

Q: A chemical reaction is carried out in a 30.0 g calorimeter. The calorimeter has a specific heat of…

A: Here the heat released by the reaction is absorbed by both the calorimeter and water inside the…

Q: A piece of hot metal, X, weighs 24.50 g.  After heating in a steam bath at 100.0oC, it is plunged…

A: The principle used here is Heat loss by metal = heat gained by water

Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 794.0 g sample…

A:

Q: 2. Carbon tetrachloride can be formed by reacting chlorine with methane: CH4 + 2 Cl2 → CCL4 + 2 H2…

A: CH4 + 2Cl2-----> CCl4 +2H2 ∆Hof (CH4) = -75 kJ/mol ∆Hof (CCl4 ) = -135 kJ/mol

Q: Which of the reactions are exothermic? 2 Mg(s) + O,(g) → 2 MgO(s) + heat O NH, (g) + HCI(g) →…

A: The reaction that releases heat during the reaction,  is called exothermic reaction.

Q: 2. A solid substance has a mass of 250 grams. It is cooled by 25.00°C and loses 4.937 kJ of heat.…

A:

Q: A gas expands and does work on the surroundings equal to 4.92 L atm. At the same time, it releases…

A: Given: Work done (W) = 4.92 L atm Heat released by the system according to sign convention (q) = -…