A granite rock (Cgranite = 0.744 J g-1 k-1) was throughly heated in a campfire to 450°C then dropped in 1.5L of water for washing the dishes (Twater = 24°C). Once thermal equilibrium was reached, the final temperature of the rock and water was 65.8°C. Assuming no loss of heat to the surroundings, what was the mass of the rock? a) 1450g b) 997g c) 1640g d) 881g e) 688g

Q: CeH6ln + 15 O2(g)12 CO2(g) + 6 H20() AH = -5.854 x 10 kJ in unknown amount of CEH6() was combusted…

A: The question is based on the concept chemical thermodynamics.   We have been given heat value.   We…

Q: A small piece of calcium carbonate was placed in a constant-volume calorimeter (Ccal=0.488  kJ/°C),…

A: Given data :  1. Ccal=0.488 kJ/°C 2. Change in temperature = 3.5 oC

Q: what is the heat evolved

A:

Q: If 500 grams of solid iron (Fe) at 100oC is placed in a calorimeter filled with 1000.0 grams of…

A: Given that: Mass of iron (Fe) = 500g Initial Temperature of Fe = 100°C Mass of water = 1000g Initial…

Q: Measurements show that the energy of a mixture of gaseous reactants decreases by 274. kJ during a…

A: Given:For the given chemical change:Calculate enthalpy change .The change in enthalpy during a…

Q: . (a) We place 77.7 g of a metal at 10.00 ◦C in 333.3 g of water at 70.00 ◦C. The water is in a…

A: Dear student, we are authorised to solve only one question at a time. Please post rest of the…

Q: In the laboratory a "coffee cup" calorimeter, or constant pressure calorimeter, is frequently used…

A:

Q: a chemist uses 200.0 mL of water at 21.01 degrees celcius to dissolve 3.7 grams of potassium…

A: We were provided with 200.0 mL of water at 21.01 degrees celcius to dissolve 3.7 grams of potassium…

Q: Q.4. In a calorimetry experiment, a 0.550 g piece of aluminum (specific heat capacity=0.897 J/g K)…

A: Thus, the heat released or absorbed is calculated using the following equation, = m×s×∆T   m = mass…

Q: In the laboratory a general chemistry student finds that when 21.57 g of BaBr₂(s) are dissolved in…

A: Since you have asked multiple questions, we will answer only the first question for you. In order to…

Q: A bomb calorimeter, or constant volume calorimeter, is a device often used to determine the heat of…

A:

Q: 60 g of 95°C espresso coffee was mixed with 185 g of 70°C milk. What is the final temperature of the…

A: Given, For coffee Mass of coffee (mcoffee) = 60 g Specific heat capacity of coffee (scoffee) = 4.19…

Q: The thermite reaction is a very exothermic reaction in the form: 2Al(s) + Fe₂O3(g) 2Fe(s) + Al2O3(s)…

A: 2Al(s) + Fe2O3(g) ----> 2Fe(s) + Al2O3(s)Energy required= 50 kJWeight of Al = 3.18 gm

Q: You were tasked to find the enthalpy change in the reaction of an unknown salt with water using a…

A: a.) To calculate value of change in enthalpy , we use formula : ∆H = - q  where, q = value of heat ,…

Q: When 23.6 g of calcium chloride, CaCl, was dissolved in water in a constant-pressure calorimeter,…

A: The mass of calcium chloride is = 23.6 g Increase in the temperature of the calorimeter is =…

Q: A generic solid, X, has a molar mass of 69.9 g/mol. In a constant-pressure calorimeter, 47.9 g of X…

A:

Q: An aluminum saucepan weighing 750 g contains 500 g of water at 25 ° C. In this water, you boil 10 g…

A: Solution - According to the question - Given - steam is bubbled into the water in the aluminum pan,…

Q: a) Consider the reaction B2H6(g) + 3 O2(g) → B2O3(s) + 3 H20(g) AH = -2035 kJ How much heat is…

A: Formula used :- Q = mCpdT  Where m is mass , Cp is specific heat capacity and dT is change in…

Q: Consider the following reaction: 2C6H6() + 15 O2(g)- 12 CO2(g) + 6 H20() AH = -5.869 x 103 kJ An…

A: Each reaction takes place account to their stoichiometric radio and account to those things the heat…

Q: How much energy is required to change the temperature of 1.50 L of water from 25.0 °C to 100.0 °C?…

A: Given : volume of water = 1.5 L = 1500 mL                                                  ( since 1…

Q: 1. During an experiment, a student added 35 J of heat to a system. At the same time, the environment…

A: According to first law of thermodynamics , increase in internal energy of the system is given by ∆U=…

Q: A chunk of tungsten weighing 18.64 grams and originally at 97.78 °C is dropped into an insulated cup…

A:

Q: A 800.8 g sample of strontium is subjected to a temperature change of +197.53K. The specific heat…

A: Mass of the sample of strontium (m) = 800.8 g Temperature change ∆T = 197.53 K Specific heat…

Q: A 2.62E1 g sample of aluminum at 1.008E2 °C is added to 1.002E2 g of water at 2.22E1 °C in a…

A: For a chemical reaction or physical process to occur a certain amount of energy should be furnished…

Q: Titanium reacts with iodine to form titanium(III) iodide, emitting heat, via the following…

A: It looks like there was a typo in the chemical equation provided. The correct balanced chemical…

Q: (b) Study the following thermochemical data very carefully: AH° = 242.3 kJ Cl2(g) → 2Cl(g) I2(g)…

A: The formation of compounds from its atoms in their stable sates at standard pressure and temperature…

Q: suppose that only two 45-g ice cubes had been added to your glass containg 5.00 x 10^2 mL of tea.…

A: q = mc(delta T)

Q: A bomb calorimeter, or constant volume calorimeter, is a device often used to determine the heat of…

A: Molar heat of combustion = - 3862 kJ/mol Mass of sample = 0.502 g  Mass of water = 1170 g  Change in…

Q: The thermite reaction, used for welding iron, is the reaction of Fe3O4 with Al. 8Al(s) + 3Fe3O4(s)…

A: Recall the given reaction,                     8 Al s  +  3 Fe3O4 s  →   4 Al2O3 s  +  9 Fe s…

Q: Measurements show that the energy of a mixture of gaseous reactants decreases by 158. kJ during a…

A:

Q: Unit 10 Q#17 When a 25.0 g sample of ethyl alcohol is burned, how much energy is released as heat?…

A: Given: Mass of Ethyl alcohol = 25 g ∆Hrxn = -1.37 × 103 KJ/mol That means on burning 1 mole of…

Q: Chem 105 Online Post Laboratory Questions: Boo 20550 ante 1. What is the purpose of rinsing the…

A: Precipitation is the technique which involves formation of a solid substance in a solution by means…

Q: An experiment is carried out where 12.2g of NaOH is dissolved in 240.0g of water in a coffee cup…

A: The experiment is the measurement of heat of dissolution of NaOH.

Q: When 15.0 mL of 3.00 M NaOH was mixed in a calorimeter with 12.5 mL of 3.00 M HCl, both initially at…

A: Given,Molarity of NaOH = 3.00 Mvolume of NaOH = 15.0 mLMolarity of HCl = 3.00 Mvolume of HCl = 12.5…

Q: A 1095 g piece of iron initially at 1371 °C is submerged in 1000.0 g of water initially at 20.0 °C.…

A: The heat released by iron helps to increase the temperature of the water.

Q: When 1.42 g of iron reacts with 1.80 g of chlorine, 3.22 g of iron(II) chloride (FeCl2, molar mass =…

A: Iron reacts with chlorine to form iron(II) chloride. When 3.22 g of  is formed, 6.8 kJ of heat is…

Q: (b) In one experiment, a 25 g sample of an alloy was heated to a certain temperature. The heated…

A:

Q: A 22.1g piece of aluminum (which has a molar capacity of 24.03 J/oC.mol) is heated to 82.4oC and…

A: Given: Mass of Al = 22.1 g. Initial temperature of Al = 82.4 oC Initial temperature of water =22.3…