Answer:
Mass of water = 41.8 g
Explanation:
Given data:
Mass of water = ?
Change in temperature = 3.0 °C
Specific heat capacity = 4.184 j/g.°C
Heat absorbed = 525 j
Solution:
Formula:
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance
ΔT = change in temperature
ΔT = 3.0°C
Now we will put the values in formula.
525 J = m × 4.184 j/g.°C × 3.0°C
525 J = m × 12.552 j/g
m = 525 J/ 12.552 j/g
m = 41.8 g
Answer:
1. Fe + H2SO4 = FeSO4 + H2
iron + sulfuric acid = duretter + hydrogen
2. Mg + 2 HNO3 = Mg(NO3)2 + H2
Magnesium + nitric acid = magnesium nitrate +hydrogen
3. Zn + 2 HCl = ZnCl2 + H2
Zinc + hydrogen chloride= zinc chloride+ hydrogen
Nucleus
Because that’s where all the chemical cell activity decisions take place
Explanation:
Temperature has a direct relationship with reaction rate. The higher the temperature the faster the rate of reaction of a system.
- For every 10°C rise in temperature above the room temperature, it has been found that reaction rates becomes double or triple.
- When the temperature of a reacting system increases, the kinetic energy of each of the reacting particles increases.
- The frequency of collision and effective collision also increases per unit of time.
- Many of the reacting particles will acquire an energy greater than or equal to the activation energy of the reaction.
