Very hot zinc will react with steam to form zinc oxide and hydrogen. What volume of steam would be necessary in order to use up 20.0 g of zinc completely? What volume of hydrogen would be produced in this case?
I NEED HELP WITH THIS!!..PLEASE = )
1.Write the equation.
2. Convert 20.0g Zn to mols Zn.
3. Using the equation convert mols Zn to mols H2O (steam).
4. Convert mols H2O (steam) to volume using mols x 22.4 L/mol = ?? L.
The part on hydrogen is a separate question but is worked by the same principles.
I did step two and got .3057 but how do i do step three?
when temp 700-900c zinc metal (99.99%) fumes quenching with super heated steam (190-200c)not ceturated steam, zinc react with oxygen make zinc oxide and hydrogen librated, u have need 55.5 gram water for 20g zinc metal in libority micro test
malik nadeem
classic chemicals lahore pakistan
To answer this question, we need to use the concept of stoichiometry. Stoichiometry is the calculation of the quantities of reactants and products involved in a chemical reaction.
First, let's write the balanced equation for the reaction between zinc and steam:
Zn + H2O → ZnO + H2
According to the equation, 1 mole of zinc reacts with 1 mole of water to produce 1 mole of zinc oxide and 1 mole of hydrogen gas.
Step 1: Calculate the number of moles of zinc (Zn):
molar mass of zinc (Zn) = 65.38 g/mol
moles of zinc = mass of zinc / molar mass of zinc
moles of zinc = 20.0 g / 65.38 g/mol
Step 2: Use the stoichiometric ratio to find the moles of hydrogen (H2):
Based on the balanced equation, 1 mole of zinc reacts to produce 1 mole of hydrogen.
moles of hydrogen (H2) = moles of zinc
Step 3: Calculate the volume of hydrogen gas produced:
Since gases occupy volumes that are directly proportional to the number of moles, we can use the ideal gas law to calculate the volume of hydrogen gas.
PV = nRT
Where:
P = pressure (usually given as constant at room temperature)
V = volume of gas (what we want to find)
n = number of moles of gas (moles of hydrogen)
R = ideal gas constant
T = temperature (usually given as constant at room temperature)
Step 4: Solve for the volume of hydrogen gas (V):
V = nRT / P
Since the pressure and temperature are typically constant under standard conditions, we can simply use the ideal gas constant (R) to calculate the volume.
R = 0.0821 L·atm/mol·K (use appropriate units depending on the given pressure and temperature)
Now, substitute the values and calculate the volume of hydrogen gas:
V = moles of hydrogen (H2) × R × T / P
The result will give you the volume of hydrogen gas in liters.
To calculate the volume of steam required, you would follow a similar approach, but you would need to know the molar mass of water and the density of water vapor at the given conditions in order to convert from grams of zinc to volume of steam.