All categories

3 years ago

The rms speed of the molecules in 1.3 g of hydrogen gas is 1600 m/s.

Physics

1 answer:

yulyashka [42]3 years ago

7 0

Answer:

Explanation:

1.3 g = 1.3 / 2 = .65 moles of hydrogen .

.65 moles = 6.02 x 10²³ x .65 molecules

Translational kinetic energy of one molecule = 1/2 mc² where c is rms speed = 1/2 x 2 x 1.67 x 10⁻²⁷ x ( 1600 )² = 42752 x 10⁻²⁵ J

Translational kinetic energy of .65 moles = 6.02 x 10²³ x .65 x 42752 x 10⁻²⁵ J

= 1673 J approx .

B ) Total thermal energy and total translational kinetic energy are same so

Thermal energy of gas = 1673 J

C ) Net content of thermal energy = 1673 + 500 - 2000 = 173 J

If c be the rms speed

1/2 x 2 x 1.67 x 10⁻²⁷ x .65 x 6.02 x 10²³ c² = 173

6.534 x 10⁻⁴ c² = 173

c² = 264769

c = 514.56 m /s

You might be interested in

Ned the skydiver weighs 600 N and is falling at terminal speed. That is, he has sped up until air resistance has built up so muc

natali 33 [55]

Answer:

The work done is 120000 J.

Explanation:

Given that,

Weight = 600 N

Distance = 200 m

We need to calculate the work done

Using formula of work done

$W=F\times d$

Where, F = force

d = distance

Put the value into the formula

$W=600\times200$

$W=120000\ J$

Hence, The work done is 120000 J.

7 0

4 years ago

An electric bell is kept under a bell jar in which a vacuum has been created. Slowly air is introduced in to the jar. What will

Aleks [24]

A. Increase until it reaches it's maximum. Sound travels through air and as the amount of air in the jar increases, the loudness or amplitude of the bell increases until it reaches it's maximum at normal air pressure.

8 0

3 years ago

Read 2 more answers

HELP ASAP!!!! Which is used to name an ionic compound?

Lina20 [59]

<span>B)if the positive ion ends in -ide </span>

7 0

3 years ago

Read 2 more answers

Suppose that the average speed (vrms) of carbon dioxide molecules (molar mass 44.0 g/mol) in a flame is found to be 2.67 105 m/s

34kurt

Answer:

$T = 1.26 \times 10^8 K$

Explanation:

As we know that rms speed of ideal gas is given by the formula

$v_{rms} = \sqrt{\frac{3RT}{M}}$

here we know that

$v_{rms} = 2.67 \times 10^5 m/s$

molecular mass of gas is given as

$M = 44 g/mol = 0.044 kg/mol$

now from above formula we have

$2.67\times 10^5 = \sqrt{\frac{3(8.31)T}{0.044}}$

now we have

$T = 1.26 \times 10^8 K$

7 0

4 years ago

A capacitor is being charged from a battery and through a resistor of 10 kΩ. It is observed that the voltage on the capacitor ri

swat32

Answer:

$C = 2.48 \times 10^{-4} Farad$

Explanation:

As per the equation of voltage on capacitor we know that

$V = V_{max}(1 - e^{-\frac{t}{\tau}})$

now we know that voltage reached to its 80% of maximum value in 4 second time

so we will have

$0.80 V_{max} = V_{max}(1 - e^{-\frac{4}{\tau}})$

$0.20 = e^{-\frac{4}{\tau}}$

$-\frac{4}{\tau} = ln(0.20)$

$-\frac{4}{\tau} = -1.61$

$\tau = 2.48$

as we know that

$\tau = RC$

$(10 k ohm)(C) = 2.48$

$C = 2.48 \times 10^{-4} Farad$

4 0

3 years ago