Question

At the surface of Venus the average temperature is a balmy 460
∘C due to the greenhouse effect (global warming!), the pressure is
92 Earth-atmospheres, and the acceleration due to gravity is 0.894
gEarth. The atmosphere is nearly all CO2 (molar mass 44.0g/mol) and
the temperature remains remarkably constant. We shall assume that
the temperature does not change at all with altitude. **Part
A** What is the atmospheric pressure 2.50 km above the
surface of Venus? Express your answer in Earth-atmospheres. Express
your answer using two significant figures.

Part B

What is the atmospheric pressure 2.50 km above the surface of Venus? Express your answer in Venus-atmospheres.

Express your answer using two significant figures.

Part C

What is the root-mean-square speed of the CO2 molecules at the surface of Venus and at an altitude of 2.50 km ?

( please can u make sure is a correct answer because i got many wrong answer for my problems before, thank u)

Answer #1

The surface pressure on Venus is 92.00 atm, and the acceleration
due to gravity there is 0.894 g. In a future exploratory mission,
an upright cylindrical tank of benzene is sealed at the top but
still pressurized at 92.00 atm just above the benzene. The tank has
a diameter of 1.75 m , and the benzene column is 10.30 m tall.
Ignore any effects due to the very high temperature on Venus.
For all answers please use, F= ? Newtons,...

a.) Calculate the gravitational potential energy of a 9.5-kg
mass on the surface of the Earth.
Express your answer using two significant figures.
b.) Calculate the gravitational potential energy of a 9.5-kg
mass at an altitude of 380 km.
Express your answer using two significant figures.
c.) Take the difference between the results for parts B and
A.
Express your answer using two significant figures.

A probe descending through Mars' atmosphere records pressure as
a function of altitude; the data are in the table below. Mars's
atmospheric pressure is governed by the equation p=p0e−h/h0.
Wolfson3.ch15.p80c.jpg Part A. Use the fitted line, in connection
with the pressure equation, to determine Mars' surface pressure.
Express your answer to three significant figures and include the
appropriate units. Part B. Use the fitted line, in connection with
the pressure equation, to determine the scale height h0. Express
your answer...

In an internal combustion engine, air at atmospheric pressure
and a temperature of about 30 ∘C∘C is compressed in the cylinder by
a piston to 1818 of its original volume (compression ratio =
8.0).
Estimate the temperature of the compressed air, assuming the
pressure reaches 47 atm .
Express your answer using two significant figures.

The air in a 4.50 L tank has a pressure of
2.00 atm . What is the final pressure, in atmospheres, when the
air is placed in tanks that have the following volumes, if there is
no change in temperature and amount of gas?
Part A- 1.12 L Express your answer using three significant
figures.
PartB-2600. mLExpress your answer using four significant
figures.
Part C-590. mLExpress your answer using three significant
figures.
Part D-9.10 LExpress your answer using three significant...

The temperature within the Earth's crust increases about 1.0 C?
for each 30 m of depth. The thermal conductivity of the crust is
0.80 W/C??m. (a)Determine the heat transferred from the interior to
the surface for the entire Earth in 9.0 h . (b)Compare this heat to
the amount of energy incident on the Earth in 9.0 h due to
radiation from the Sun. Express your answer using two significant
figures.

An instrument package is projected vertically upward to collect
data near the top of the Earth's atmosphere (at an altitude of
about 840 km ).
Part A
What initial speed is required at the Earth's surface for the
package to reach this height?
Express your answer using two significant figures.
Part B
What percentage of the escape speed is this initial speed?
Express your answer using two significant figures.

At 20 ∘C (approximately room temperature) the average velocity
of N2 molecules in air is 1050 mph.
Part A What is the kinetic energy (in J) of an N2 molecule
moving at this speed? Express your answer using four significant
figures.
Part B What is the total kinetic energy of 1 mol of N2 molecules
moving at this speed? Express your answer using four significant
figures.

Consider the following reaction:
PbCO3(s)←−→PbO(s)+CO2(g)
Part A: Using data in Appendix C in the textbook, calculate the
equilibrium pressure of CO2 in the system at 440 ∘C. Express your
answer using two significant figures.
Part B: Using data in Appendix C in the textbook, calculate the
equilibrium pressure of CO2 in the system at 250 ∘C. Express your
answer using two significant figures.

Suppose a gas-filled incandescent light bulb is manufactured so
that the gas inside the bulb is at atmospheric pressure (absolute
pressure) when the bulb has a temperature of 18.1°C. (Enter your
answers to at least four significant figures.)
(a) Find the gauge pressure inside such a bulb in atmospheres
when it is hot, assuming its average temperature is 57.0°C(an
approximation) and neglecting any change in volume due to thermal
expansion or gas leaks.
(b) The actual final pressure for the...

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