The electron gain for iron means that it is reduced (answer C)
Explanation
Redox reaction is made up of two halves.
That is a reduction half and a oxidization half.
In the reduction half electrons are gained which result to decrease in oxidation number.
In the Oxidization half electrons are lost which result to increase in oxidation number.
iron is therefore reduced since it gains electrons
Answer:
THE AMOUNT OF HEAT ABSORBED DURING THE REACTION IS 151.64 JOULES
Explanation:
Mass = 12.58 g
Specific heat of CaCO3 = 0.82 J/g K
Change in temperature = 38.3 C - 23.6 C = 14.7 C
How many joules of heat are absorbed?
Heat of a reaction is the amount of heat absorbed or evolved when a gram of a sample is raised by 1 C.
Heat = mass * specific heat * change in temperature
Heat = 12.58 * 0.82 * 14.7
Heat = 151.64 J
The amount of joules absorbed during this reaction is 151.64 J.
<span>25.
_____ Heat content of a system at constant pressure calorie (cal) ---> Enthalpy
26.
_____ Ability to do work Chemical ----> Energy
27. _____ Disorder ----> Entropy
28. _____ Energy of motion ----> Kinetic energy
29. _____ Study of energy
changes that ocrrue during chemic reaction and changes in states. ----> Thermochemestry
30. _____ Amount of heat required to raise T of 1 g of pure
water 1◦C ----> Specific heat</span>
The think the correct answer is they are not made from living things
I may be wrong but I am sure this is correct