Chemistry-
General
Easy
Question
When charcoal burns in air signs of ΔH and ΔS are 
H (-),
S (-)
H (-),
S (+)
H (+),
S (+)
H (+),
S (-)
The correct answer is:
H (-),
S (+)
Related Questions to study
chemistry-
What are the signs of the entropy change (+ or - ) in the following:
I) A liquid crystallises into a solid
II) Temperature of a crystalline solid is raised from 0 K to 115 K
III) 
IV) 
What are the signs of the entropy change (+ or - ) in the following:
I) A liquid crystallises into a solid
II) Temperature of a crystalline solid is raised from 0 K to 115 K
III) 
IV) 
chemistry-General
chemistry-
Which has maximum entropy change of vaporisation ?
Which has maximum entropy change of vaporisation ?
chemistry-General
chemistry-
The molar heat capacities at constant pressure (assumed constant with respect to temperature) at A, B and C are in ratio of 3:1.5:2.0. The enthalpy change for the exothermic reaction
at 300 K and 310 K is
and
respectively then :
The molar heat capacities at constant pressure (assumed constant with respect to temperature) at A, B and C are in ratio of 3:1.5:2.0. The enthalpy change for the exothermic reaction
at 300 K and 310 K is
and
respectively then :
chemistry-General
chemistry-
Number of phases present in the following thermodynamic systems are:
1) 
2) 
3) 
Number of phases present in the following thermodynamic systems are:
1) 
2) 
3) 
chemistry-General
maths-
For the circuits shown below, the Boolean polynomial is

For the circuits shown below, the Boolean polynomial is

maths-General
maths-
Let B={p, q, r, .....} and let two binary operations be denoted by ‘
' and ‘
’ or ‘+’ or ‘.’, then
Let B={p, q, r, .....} and let two binary operations be denoted by ‘
' and ‘
’ or ‘+’ or ‘.’, then
maths-General
maths-
Let B={p, q, r, .....} and let two binary operations be denoted by ‘
' and ‘
’ or ‘+’ or ‘.’, then
Let B={p, q, r, .....} and let two binary operations be denoted by ‘
' and ‘
’ or ‘+’ or ‘.’, then
maths-General
maths-
Let B={p, q, r, .....} and let two binary operations be denoted by ‘
' and ‘
’ or ‘+’ or ‘.’, then
Let B={p, q, r, .....} and let two binary operations be denoted by ‘
' and ‘
’ or ‘+’ or ‘.’, then
maths-General
maths-
Let B={p, q, r, .....} and let two binary operations be denoted by ‘
' and ‘
’ or ‘+’ or ‘.’, then
Let B={p, q, r, .....} and let two binary operations be denoted by ‘
' and ‘
’ or ‘+’ or ‘.’, then
maths-General
maths-
Let B={p, q, r, .....} and let two binary operations be denoted by ‘
' and ‘
’ or ‘+’ or ‘.’, then
Let B={p, q, r, .....} and let two binary operations be denoted by ‘
' and ‘
’ or ‘+’ or ‘.’, then
maths-General
maths-
Let B={p, q, r, .....} and let two binary operations be denoted by ‘
' and ‘
’ or ‘+’ or ‘.’, then
Let B={p, q, r, .....} and let two binary operations be denoted by ‘
' and ‘
’ or ‘+’ or ‘.’, then
maths-General
maths-
Let B={p, q, r, .....} and let two binary operations be denoted by ‘
' and ‘
’ or ‘+’ or ‘.’, then
Let B={p, q, r, .....} and let two binary operations be denoted by ‘
' and ‘
’ or ‘+’ or ‘.’, then
maths-General
maths-
Let B={p, q, r, .....} and let two binary operations be denoted by ‘
' and ‘
’ or ‘+’ or ‘.’, then
Let B={p, q, r, .....} and let two binary operations be denoted by ‘
' and ‘
’ or ‘+’ or ‘.’, then
maths-General
maths-
Let B={p, q, r, .....} and let two binary operations be denoted by ‘
' and ‘
’ or ‘+’ or ‘.’, then
Let B={p, q, r, .....} and let two binary operations be denoted by ‘
' and ‘
’ or ‘+’ or ‘.’, then
maths-General
maths-
Let B={p, q, r, .....} and let two binary operations be denoted by ‘
' and ‘
’ or ‘+’ or ‘.’, then
Let B={p, q, r, .....} and let two binary operations be denoted by ‘
' and ‘
’ or ‘+’ or ‘.’, then
maths-General