The table below shows the freezing points of four substances. substance freezing point (°c) benzene 5.5 water 0 butane –138 nitrogen –210 the substances are placed in separate containers at room temperature, and each container is gradually cooled. which of these substances will solidify before the temperature reaches 0°c? benzene water butane nitrogen

Benzene.

Explanation:

So, benzene is the substance will solidify before the temperature reaches 0°C because its freezing point is 5.5°C.

 Benzene

Explanation:  The freezing point is the temperature at which the liquid solidifies or passes into a solid state. According to the precise professional, scientific vocabulary, it is the temperature at which the liquid and solid state of the substance is in equilibrium at atmospheric pressure. For example, the water freezing point is 0 ° C, which is at the same time the melting point, that is, when the water from the solid state, ice, passes into the liquid state.

According to given freezing points for these four substances that are placed in separate containers at room temperature and which are gradually cooled, the first substance which will solidify first before the temperature drops to 0 ° C is benzene because its freezing point is 5.5 ° C.

answer: the value of enthalpy change will be -152.80 kj.

solution:

pressure = 1atm , temperature = = 298 k

given that pressure and temperature are same in both gases , the number of moles of both gases can be determined by the ideal gas equation.

according to reaction 3 moles no are reacting with 1 mol of ,then 0.49 mol of no will react with moles of ozone that is 0.16 moles of ozone. since, no is limiting reagent and is an excessive reagent.

enthalpy change for the reaction between the given volumes of the gases is :

yes

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