. The heat of reaction, N2 + 3H2 → 2NH3, at 27 °C
was found to be -21.976 kcal. What will be the heat
of the reaction at 50 °C? (The molar heat capacities at
constant pressure for nitrogen, hydrogen and ammonia
are 6.8, 6.77 and 8.86 cal mol-degree-l respectively.)
(a) -22.192 kcal
(b) -24.132 kcal
(c) -21.760 kcal
(d) -21.976 kcal
Answers
Explanation:
Answer:
Avogadro's hypothesis is:
At constant temperature and pressure, equal volumes of all gases contain same number of molecules. Thus, according to the law, for an ideal gas, there is a direct proportionality between number of moles and volume, when the temperature and pressure remains constant.
Explanation:
Avagadro's hypothesis is defined by
It is written as:
v \propto nv∝n
\frac{v}{n}=k
n
v
=k
In this expression,
n = number of moles present in the gas.
V = Volume of the gas.
k = proportionality constant.
So, when the amount of moles for a gas increases, there is proportionate increase in volume. If the quantity of moles decreases, then the volume correspondingly decreases.
From the above expression, it can thus be seen that:
\frac{V_{1}}{n_{1}}=\frac{V_{2}}{n_{2}}
n
1
V
1
=
n
2
V
2
This implies that, for two different gases with equal volumes, but same conditions of temperature and pressure, the amount of the gas will be equal.
Answer:
What will be the heat of reaction at 50°C