CHEMISTRY HIGH SCHOOL

A gas in a rigid container at 25°C has a pressure of 0.96 atm. A change in temperature causes the pressure to increase to 1.25 atm. What is the new temperature of the gas?a...–44.2°C

b....32.6°C

c....115°C

d...388°C

Answers

Answer 1
Answer:

Gay-Lussacs law states that pressure of a gas is directly proportional to temperature when the volume is kept constant

P / T = k

where P - pressure , T - temperature in kelvin and k - constant

(P1)/(T1) = (P2)/(T2)

where parameters for the first instance are on the left side of the equation and parameters for the second instance are on the right side of the equation

T1 - 25 °C + 273 = 298 K

substituting the values in the equation

(0.96 atm)/(298 K)= (1.25 atm)/(T2)

T2 = 388 K

temperature in celcius - 388 K - 273 = 115 °C

answer is C. 115 °C
Answer 2
Answer: Question: A gas in a rigid container at 25°C has a pressure of 0.96 atm. A change in temperature causes the pressure to increase to 1.25 atm. What is the new temperature of the gas? a...–44.2°C b....32.6°C c....115°C d...388°C Answer: Answer is c....115°C.

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A scientist carries out a reaction twice. In Trial A, the scientist combines the reactants in a container. In Trial B, the scientist combines the reactants in the same container, but she also adds a catalyst. If everything else is the same about the two trials, what is most likely true about Trial B?

Answers

Trail B will have a lower activation energy than trail A because in this trial the scientist added a catalyst.

What is a catalyst?

A catalyst is a substance that can be added to a reaction to increase the reaction rate without getting consumed in the process.

A catalyst is a substance that speeds up a chemical reaction or lowers the temperature or pressure needed to start one, without itself being consumed during the reaction.  

Catalysts slow down reaction rates which will in turn mean a loweractivation.

Hence, trail B will have a lower activation energy than trail A because in this trial the scientist added a catalyst.

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Answer:

It will have a lower activation energy than Trial A.

Explanation:

Trail B will have a lower activation energy than trail A because in this trial the scientist adds a catalyst. Catalysts slow down reaction rates which will in turn mean a lower activation.

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Answers

Ionic bonds are formed between a metal and non-metal. Among the given compounds, KCl is the ionic compound formed from potassium metal and chlorine.

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