Asked Nov 6, 2019

When 1.34 g Zn(s) reacts with 60.0 mL of 0.750 M HCl(aq), 3.14 kJ of heat are produced. Determine the enthalpy change per mole of zinc reacting for the reaction:


Expert Answer

Step 1


1.34 g Zn reacts with 60.0 mL of 0.750 M HCl(aq).

Heat released is 3.14 KJ.

Molar mass of  Zn = 65.38 g/mol


Image Transcriptionclose

The given balanced equation is shown below Zn(s)+2HC1(aq)ZnCl, (aq)+H (g) Number of moles of Zn is calculated as follows, Mass Moles Molar mass 1.34g Moles 65.38 g/mol Moles 0.02049 Number of moles of HCl is calculated as follows Number of moles = Molarity xVolume Number of moles 0.750 M x 60.0 mL Number of moles= 0.750M x 0.06 L Number of moles 0.045

Step 2

According to the balanced chemical equation, one mole of Zn reacted...


Image Transcriptionclose

The given balanced equation is shown below Zn(s)+2HC1(aq)ZnCl, ( aq) +H, (g) The moles of Zn is calculated as follows, 1 x moles of HCl 2 Moles of Zn 1 x 0.045moles of Ha Moles of Zn Moles of Zn 0.0225m oles From the reaction, Zn is used as a limiting reagent


Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in



General Chemistry

Related Chemistry Q&A

Find answers to questions asked by student like you
Show more Q&A

Q: What is the pressure of N2 (g) inside a 20-L airbag that is inflated by the decomposition of 130 g o...

A: The moles of N2 is determined first.


Q: Determine Km and Vmax for no inhibitor,Tamiflu, and Relenza.

A: The relationship between Km and Vmax is shown in the below Lineweaver-Burk plot:


Q: The concept of determining which reactant is limiting and which is in excess is akin to determining ...

A: The limiting reagent refers to the compound that is fully utilized after the completion of chemical ...


Q: Can you explain the equilibrium in acids and bases (arrhenius definition)?

A: An acid is a substance that gives  ions in its solution whereas a basic substance gives  ions in its...


Q: What are some common strong nucleophiles in organic chemistry?

A: Strong nucleophile means an atom or a group carry lone pair of electrons. It is effectively go to at...


Q: 1A 8А H 2A 3A 4A SA 6A 7A He NOF Ne Li Be BC 88 — 1в 2в AI Si P| S CI Ar Na Mg зв 4B S8 6B 7B K Ca S...

A: The term electronic configuration can be used to describe the distribution of the electrons of a giv...


Q: Calculate the w/v percentage of each of these solutes: A. 623 mg of casein in 15 mL of milk B. 74 mg...

A: Part-a: 623 mg of casein in 15 mL of milk Formula to calculate w/v percentage :w/v percentage = mass...


Q: 23U (atoic mass 238.050784 u) decays via alpha decay to 234Th (atomic mass 234.043593 u). What is th...

A: Alpha-decay of  238uranium is shown by equation (1)Mass of uranium atom =238.0507785 uMass of thoriu...


Q: sketch and label the orbitals in ethene according to valence bond theory?

A: Valence bond theory is abbreviated as VBT. The theory explains about the chemical bonding. It tells ...