Here are a few questions from a worksheet of 25, that i cannot figure out. I have looked in my textbook and online for help but did not come across anything that explained any of this. I have provided the answers i've chosen, but i'm not sure if they are correct. Can anyone please help me understand these problems and what are the correct answers. Thank you.
1) The molar heat of fusion, ΔHfus, for water is 6.01 kJ mol^-1. Which expression gives the molar entropy of fusion, ΔSfus, in kJ K^-1 mol^-1 for ice at its normal melting point?
a)6.01/273
b)6.01/298
c)6.01 x 4.18
d)6.01 x 273
e)6.01 x 298
2)The molar heat of fusion, ΔHfus, for water is 6.01 kJ mol^-1. The specific heat capacity for water, Cp, is 75 J mol^-1 degrees C^-1. Which expression gives the quantity of energy needed to change 1.0 mol ice at 0 degrees C to liquid water at 25 degrees C?
a)6010/(75x25)
b)6.01 + 75
c)6010 + (75 x 25)
d)6010/298 + (75x25)
e) 6010 + (75x25)/(298)
3) The heat of neutralization for a strong acid in dilute water solution is about 60 kJ mol^-1. what quantity of heat in kJ is produced when 100. ml of 1.0 M h2so4 is mixe with 100. ml of 1.0 M KOH?
a)0.10
b)0.30
c)0.40
d)6.0
e)18
4) for which reaction is ΔH most nearly equal to ΔE?
a)H2(g) + 1/2O2(g) > H2O(g)
b)H2(g) + Cl2(g) > 2HCl(g)
c)C2H5OH(l)>C2H5OH(g)
d)N2O4(g) > 2NO2(g)
e)BaO2(s)>BaO(s) + 1/2O2(g)
My answers:
1)b
2)d
3)d
4)b