Chemistry, 29.06.2019 23:00 dianamunoz580

The instruction booklet for your pressure cooker indicates that its highest setting is 12.8 psi . you know that standard atmospheric pressure is 14.7 psi, so the booklet must mean 12.8 psi above atmospheric pressure. at what temperature in degrees celsius will your food cook in this pressure cooker set on "high"?

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Answer from: nick974

At 237.57^oC food will cook in the pressure cooker set on high.

Explanation:

Standard atmospheric pressure P_1 = 14.7 Psi = 1.0001 atm (1 Psi=0.06804 atm)

Standard temperature T_1 = 273.15 K

Highest pressure offered by pressure cooker: 12.8 Psi = 0.8709 atm

Pressure ( P_2 ) inside the pressure cooker on the highest setting at temperature T_2 :

P_2 = 1.0001 atm + 0.8709 atm = 1.8710 atm

According to Gay lussac law :

$(pressure)\propto (temperature)$ (at constant Volume)

$\frac{P_1}{T_1}=\frac{P_2}{T_2}$

$T_2=\frac{P_2\times T_1}{P_1}=\frac{1.8710 atm\times 273.15 K}{1.0001 atm}=510.73 K= 237.57^oC (T(^oC)=T-273.15 K)$

At 237.57^oC food will cook in the pressure cooker set on high.

Answer from: tatedason33741

The temperature in the pressure cooker set on high is 237.71°C

Explanation:

STP conditions:

Pressure = 14.7 psi

Temperature = 273 K

To calculate the final temperature of the system, we use the equation given by Gay-Lussac Law. This law states that pressure of the gas is directly proportional to the temperature of the gas at constant pressure.

Mathematically,

$\frac{P_1}{T_1}=\frac{P_2}{T_2}$

where,

$P_1\text{ and }T_1$ are the initial pressure and temperature of the gas.

$P_2\text{ and }T_2$ are the final pressure and temperature of the gas.

We are given:

$P_1=14.7psi\\T_1=273K\\P_2=(14.7+12.8)psi=27.5psi\\T_2=?$

Putting values in above equation, we get:

$\frac{14.7psi}{273K}=\frac{27.5psi}{T_2}\\\\T_2=510.71K$

Converting the temperature from kelvins to degree Celsius, by using the conversion factor:

T(K)=T(^oC)+273

$510.71=T(^oC)+273\\T(^oC)=237.71^oC$

Hence, the temperature in the pressure cooker set on high is 237.71°C

Answer from: Quest

c. is the answer

by love gaming

Answer from: Quest

Answer : option a) 84explanation :

considering the question as per the attachment

$^{222}_{86}> ^{218}_{84}po+^{4}_{2}he$

here we can see that the radon nuclide has 222 as the atomic mass number and 86 as the atomic number.

when it undergoes nuclear fission it gives polonium which has atomic mass number as 218 and atomic number will be 84 along with a helium nucleus which has 4 atomic mass number and 2 as its atomic number.

222 = 218 + 4 (atomic mass number)

86 = ? + 2; therefore ? = 86-2 = 84.

the atomic mass number of polonium will be 84.

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