Answer: If a reaction releases 675,000 Joules then it means it releases 161.328872 kcal.
Explanation:
According to the standard conversion,
Therefore, 675,000 Joules will be converted into kcal as follows.
Thus, we can conclude that if a reaction releases 675,000 Joules then it means it releases 161.328872 kcal.
Answer : The correct option is (3) Evaporation.
Explanation :
Evaporation : It is a process in which the liquid particles are converted to gaseous particles. The inter-molecular forces of attraction between the liquid particles will be weakened. As a result the phase change occurs.
Freezing : It is a process in which a phase changes from liquid state to solid state.
Condensation : It is a process in which a phase changes from gaseous state to liquid state.
Crystallization : It is a process in which a solute particles get separated from the solvent in the form of crystals ( in solid phase).
Whereas in freezing, condensation and crystallization we are moving from one phase having weaker inter-molecular forces of attraction to another phase having stronger inter-molecular forces of attraction. So, in these processes strengthening of attraction between the particles takes place.
Hence, the correct answer is Evaporation.
Answer:
0.098 pounds per cubic inch
Explanation:
The density of aluminum is 2.7 grams per cubic centimeter (2.7g/cm^3)
2.7g/cm^3 × 1lb/453.59g × (2.54cm)^3/(1in)^3 = 0.098lb/in^3
It would take 1.16 h for the runner to finish the race
.
<em>Step 1. </em>Convert <em>kilometres to miles</em>.
11 km × (0.621 mi/1 km) = 6.83 mi
<em>Step 2</em>. Calculate the <em>time</em>.
Time = 6.83 mi × (1 h/5.7 mi) = 1.16 h
