<u>Answer:</u> The number of moles of nitrogen gas is 0.505 moles.
<u>Explanation:</u>
To calculate the number of moles of nitrogen gas, we use ideal gas equation, which is:
where,
P = pressure of the gas = 4.27 atm
V = Volume of the gas = 2.96 L
T = Temperature of the gas =
R = Gas constant =
n = number of moles of gas = ?
Putting values in above equation, we get:
Hence, the number of moles of nitrogen gas is 0.505 moles.
Answer:
it is endothermic because it doesn't affect the glass used
Provides sunlight... Photosynthesis...heats earth...XD
The given question is incomplete. The complete question is as follows.
A 56-kg hiker is climbing the 828-m-tall Burj Khalifa in Dubai. If the efficiency of converting the energy content of the bars into the work of climbing is 25%, the remaining 75% of the energy released through metabolism is heat released to her body. She eats two energy bars, one of which produces 1.10×103kJ of energy upon metabolizing. Assume that the heat capacity of her body is equal to that for water (75.3 Jmol−1⋅K−1). Calculate the increase in her temperature at the top of the structure.
Calculate the temperature at the top of the structure. Assume her intitial temperature to be .
Explanation:
Energy present in total of two bars is as follows.
kJ
(as 1 kJ = 1000 J)
As 75% of energy releases out. Let us assume that energy releases out of its body be E. Then, energy will be calculated as follows.
E =
= J
Given data is as follows.
mass (m) = 56 kg
= 56000 g (1 kg = 1000 g)
Specific heat = 4.18
As heat is releasing which means that value of E will be negative.
-E =
Her temperature at the top of the structure is .
Now, change in temperature is calculated as follows.
=
Thus, we can conclude that increase in her temperature at the top of the structure is .
CaBr conducts electricity in the molten state but does not conduct as a solid. ionic dissolution equation.