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Which equation represents an exothermic reaction at 298 K?
An exothermic reaction is one where heat is released to the surroundings. An example of an exothermic reaction equation at 298 K is: 2H2(g) + O2(g) -> 2H2O(l) + heat
What is the ratio of the average velocity of hydrogen molecules to that of neon atoms at the same temperature and pressure?
The ratio of the average velocity of hydrogen molecules to neon atoms is the square root of the ratio of their molar masses. Since the molar mass of neon is about 20 times that of hydrogen, the average velocity of hydrogen molecules would be about √20 times faster than that of neon atoms.
What is room temperature in kelvin?
If we assume "room temperature" to be 25 °C (77 °F) then that would equate to 298.15 K. Different areas assume different standard "room temperature" - but it usually falls between 20 °C (293.15 K) and 30 °C (303.15 K)
What form a spontaneous reaction at 298 K?
A spontaneous reaction at 298 K is one in which the Gibbs free energy change (ΔG) is negative. This means that the reaction is energetically favorable and will proceed in the forward direction without the need for external energy input.
What is hydrogen at freezing point?
At freezing point hydrogen is a liquid, equilibrated with its solid state of matter. Hydrogen: Melting point 14.01 K, -259.14 °C, -434.45 °F Boiling point 20.28 K, -252.87 °C, -423.17 °F
What state is oxygen at 298 K?
Oxygen is a gas at 298 K.
What is 298 Fahrenheit converted into kelvins?
298 degrees Fahrenheit = 420.93 K.
What is the numerical value of Kw at 298 k?
The value of Kw (ion product of water) at 298 K is approximately 1.00 x 10^-14.
What is the velocity of hydrogen?
The velocity of hydrogen can vary depending on the specific conditions, such as temperature and pressure. In a broad sense, hydrogen molecules at room temperature have an average velocity of about 1.8 km/s.
0.783 g of hydrogen gas is placed in an container of volume 657 mL at a temperature of 342 K What is the pressure in ATM?
Using the Ideal Gas Law (PV = nRT), you can calculate the pressure of the hydrogen gas. First, convert the mass of hydrogen to moles using the molar mass of hydrogen. Once you have moles of hydrogen, you can calculate the pressure given the volume, temperature, and the gas constant (0.0821 Latm/molK).
Which element at 101.3kPa and 298 K?
At 101.3 kPa and 298 K, the element present is likely to be oxygen (O2) due to its high natural abundance in the atmosphere and its physical properties at that temperature and pressure.
Which compound is formed from its elements by an exothermic reaction at 298 K and 101.3 kPa?
Carbon dioxide (CO2) is formed from its elements (carbon and oxygen) by an exothermic reaction at 298 K and 101.3 kPa.
What is form for aluminum?
Aluminum is a metallic substance. It is solid at 298 K. It is silvery in color.
25 degrees celsius is equal to how many degrees kelvin?
Answer: 25 ºC = 298 K
Is 298k is standard temperature or 273.15?
298 K is the standard room temperature, while 273.15 K is the standard temperature for converting Celsius to Kelvin.
Is velocity of sound maximum in hydrogen oxygen ammonia or in nitrogen?
The velocity of sound is highest in a medium where the particles are closest together and have strong intermolecular forces, which allows sound waves to travel more efficiently. Therefore, the velocity of sound is highest in ammonia, followed by nitrogen, hydrogen, and then oxygen.
Which equation represents an exothermic reaction at 298 K?
An exothermic reaction is one where heat is released to the surroundings. An example of an exothermic reaction equation at 298 K is: 2H2(g) + O2(g) -> 2H2O(l) + heat
