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Chapter 8: Q. 8.73 (page 282)

A sample of Hydrogen $(H_{2})$ gas at $127 掳 C$ has a pressure of $2.00 a t m$ . at final temperature, in degrees Celcius, will the pressure of the $H_{2}$ decreases to $0.25 a t m$ , if $V a n d n$ do not change?

Short Answer

Expert verified

The final temperature of $H_{2}$ will be $- 223 掳 C$ .

Step by step solution

01

Given Information

We have given the temperature is $127 掳 C$ and pressure is $2.00 a t m$ of Hydrogen $(H_{2})$ .

02

Simplify

According to the question, there will be no change in the amount of gas and the volume of the gas will also be constant.

Using combined gas law

$\frac{p_{1} V_{1}}{T_{1}} = \frac{p_{2} V_{2}}{T_{2}}$

We can see, the pressure is directly related to the temperature.

So,

role="math" localid="1652528887995" $T_{2} = \frac{P_{2} T_{2}}{P_{1}} = \frac{0.25 a t m 脳 400 K}{2 a t m} T_{2} = 50 K T_{2} = (50 - 273) 掳 C = - 223 掳 C$

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Most popular questions from this chapter

A sample of neon initially has a volume of $2.50 L$ at $15 掳 C$ . What final temperature, in degrees Celsius, is needed to change the volume of the gas to each of the following, if $P$ and $n$ do not change?

a. $5.00 L$

b . $1250 m L$

c. $7.50 L$

d. $3550 m L$

A gas sample has a volume of $4250 m L$ at $15 掳 C$ and $745 m m H g$ . What is the final temperature, in degrees Celsius, after the sample is transferred to a different container with a volume of $2.50 L$ and a pressure of $1.20 a t m$ if the amount of gas does not change? $(8.5)$

A sample of helium gas has a volume of $6.50 L$ at a pressure of $845 m m H g$ and a temperature of $25 掳 C$ . What is the final pressure of the gas, in atmospheres, when the volume and temperature of the gas sample are changed to the following if the amount of gas does not change?

a. $1850 m L a n d 325 K$

b. $2.25 L a n d 12 掳 C$

c. $12.8 L a n d 47 掳 C$

Identify the property of a gas that is measured in each of the following:

a. $350 K$

b. $125 m L$

c. $2 g$ of $O_{2}$

d. role="math" localid="1652460919368" $755 m m H g$

Whitney's lung capacity was measured as $3.2 L$ at a body temperature of $37 掳 C$ and a pressure of $745 m m H g$ . What is her lung capacity, in liters, at STP?

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