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4.50 g of methane gas (CH4) occupies 12.7 L at 310 K. Calculate the work, heat, energy and enthalpy change upon: a) expansion by 3.3 L at p=const (isobaric). b) isothermal expansion by 3.3. L against a constant external pressure of 30.0 kPa c) reversible isothermal expansion by 3.3 L.
A chemical reaction takes place in a container of cross-sectional area 100 cm2. As a result of the reaction, a piston is pushed out through 21 cm against an external pressure of 534 torr.
Determine the trend in sizes of the ions O 2- ,N 3- , F - and also explain why does the trend exist? Also describe which of the molecules contains polar covalent bonds but is NOT itself a polar molecule?
The alpha particles emitted by radon-222 have an energy of 8.8 x 10^-13 J. If a 200. g Pb brick absorbs 1.0 x 10^10 alpha particles from radon decay, what dose in rads will the brick absorb
a second order reaction has rate constant .028M^-1hr^-1. initial concentration is 3.4 M. what will be the percentage remaining after a period of 24 hours?
When two atoms of 2H (deuterium) are fused to form one atom of 4He (helium), the total energy evolved is 3.83 × 10-12 joules. What is the total change in mass
The inventor proposed the revolutionary design of the new engine based on the heat stored in the ocean. The inventor plan is to mount it on a boat in San Francisco and set off on a journey across the Pacific Ocean.
write the most stable lewis structure for C2F4 and state the hybridization of the carbon atom
How do you calculate the percent by mass of volatile water in hydrated salt and average H20 when the mass of hydrated salt
Why An adequate answer will address what the reported melting point and percent yeild suggest about the purity of the isolated trimyristin.
Write a complete mechanism for the addition of diethyl malonate to ethanal in the presence of base to form a beta-hydroxy ester.
what mole ratio of molecular chlorine to molecular oxygen would result from the breakup of compound Cl2O7 into its constituent elements.
What is the pH at the point during a titration when 30 mL of 0.200 M HCl has been added to 31 mL of 0.0500 M NH3 solution? HCl is strong acid, Kb = 1.8 × 10-5 for NH3.Answer in units of pH.
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