chemistry

When 0.627 g of Ca metal is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 102C is observed.
Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC.

The molar heat of reaction, H rxn, for the reaction of

Ca(s) + 2H+(aq) Ca2+(aq) + H2(g)

is ____kJ/mol.

  1. 👍
  2. 👎
  3. 👁
  1. Addressed in your next post.

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. general chem

    Using the activity series (Table 4.5), write balanced chemical equations for the following reactions. If no reaction occurs, simply write NR. (a) Nickel metal is added to a solution of copper (II) nitrate; (b) a solution of zinc

  2. Chemistry

    How many joules are required to raise the temperature of 450mL of water from 30 °C to 100 °C? The specific heat of copper metal is 0.385 J/ g- K. How many KJ of heat needed to raise the temperature of 1.1 kg block of copper from

  3. chemistry

    Using the activity series, write a balanced chemical equation for the following reactions: 1. iron metal is added to a solution of copper (II) nitrate 2. zinc metal is added to a solution of magnesium sulfate 3. hydrobromic acid

  4. Chemistry

    A student must make 500 mL of a 1.5 M HCl solution. The student has plenty of water and a stock solution of 6.0 M HCl to use. What volume of the 6.0 M HCl solution must be added to what volume of water to make the desired 500 mL

  1. Science

    How much sodium hydroxide, at what concentration, do I need to add to 500 mL of 0.1 N HCL to obtain pH 6.8. How do you calculate this? pH = -log(H^+) M HCl = N HCl mols = M x L. After you know mols HCl you have, then make a

  2. Chemistry

    How many grams of HCl are needed in order to make 0.500 liters of a 0.100 M HCl solution? 1.82 g 18.2 g 0.500 g

  3. chemistry

    All of the lanthanide metals react with HCl to form compounds having the formula MCl2,MCl3,or MCl4 (where M represents the metallic element). Each metal forms a single compound. A chemist has .250g sample of a transition metal,

  4. AP Chemistry

    If a sample of 27.0 g of aluminum metal is added to 333 mL of 3.0 M HCL acid, the volume of hydrogen gas produced at standard temperature and pressure is a. 2.8 L b. 5.60 L c. 11.2 L d. 22.4 L

  1. Chemsitry

    During an experiment, a student adds 1.23 g of CaO to 200.0 mL of 0.500 M HCl. The student observes a temperature increase of 5.10 °C. Assuming the solution\'s final volume is 200.0 mL, the density if 1.00 g/mL, and the heat

  2. Chemistry URGENT!

    If the reaction of 0.500 grams of aluminum metal with excess aqueous HCl releases 9.72 kJ of heat, what is the ΔH value for the reaction? 2 Al(s) + 6 HCl(aq) → 2 AlCl3(aq) + 3 H2(g) All I have is: .500gAl*(1 mol Al/26.98gAl)

  3. Chemistry

    The Kb for trimethylamine, (CH3)3N is 6.40x10-5. If 100 mL of 0.655 M trimethylamine is titrated with 0.500 M HCl calculate the pH of the solution… a) after 30.0 mL of HCl has been added to the solution. [10.3] b) at the

  4. Chemistry

    A piece of metal weighing 20.32 grams is added to a flask with a volume of 24.5 cm3. It is found that 18.52 grams of water must be added to the metal to fill the flask. What is the density of the metal?

You can view more similar questions or ask a new question.