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Chemistry-

General

Easy

Question

When charcoal burns in air signs of ΔH and ΔS are $colon 2 C subscript left parenthesis s right parenthesis end subscript plus O subscript 2 left parenthesis text end text g right parenthesis end subscript rightwards arrow 2 C O subscript left parenthesis g right parenthesis end subscript$

$Δ$ H (-), $Δ$ S (-)
$Δ$ H (-), $Δ$ S (+)
$Δ$ H (+), $Δ$ S (+)
$Δ$ H (+), $Δ$ S (-)

The correct answer is: $capital delta$ H (-), $capital delta$ S (+)

Related Questions to study

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) $2 NaHCO subscript 3 left parenthesis straight s right parenthesis not stretchy rightwards arrow Na subscript 2 CO subscript 3 left parenthesis straight s right parenthesis not stretchy rightwards arrow Na subscript 2 CO subscript 3 left parenthesis straight s right parenthesis plus CO subscript 2 left parenthesis straight g right parenthesis plus straight H subscript 2 straight O left parenthesis straight g right parenthesis$
IV) $straight H subscript 2 left parenthesis straight g right parenthesis not stretchy rightwards arrow 2 straight H left parenthesis straight g right parenthesis$

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) $2 NaHCO subscript 3 left parenthesis straight s right parenthesis not stretchy rightwards arrow Na subscript 2 CO subscript 3 left parenthesis straight s right parenthesis not stretchy rightwards arrow Na subscript 2 CO subscript 3 left parenthesis straight s right parenthesis plus CO subscript 2 left parenthesis straight g right parenthesis plus straight H subscript 2 straight O left parenthesis straight g right parenthesis$
IV) $straight H subscript 2 left parenthesis straight g right parenthesis not stretchy rightwards arrow 2 straight H left parenthesis straight g right parenthesis$

chemistry-General

Which has maximum entropy change of vaporisation ?

Which has maximum entropy change of vaporisation ?

chemistry-General

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 $A plus 2 text end text B rightwards arrow 3 C$ at 300 K and 310 K is $capital delta H subscript 300 end subscript$ and $capital delta H subscript 310 end subscript$ 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 $A plus 2 text end text B rightwards arrow 3 C$ at 300 K and 310 K is $capital delta H subscript 300 end subscript$ and $capital delta H subscript 310 end subscript$ respectively then :

chemistry-General

parallel

Number of phases present in the following thermodynamic systems are:
1) $N H subscript 4 end subscript H S open parentheses s close parentheses rightwards arrow N H subscript 3 end subscript left parenthesis text end text g right parenthesis plus H subscript 2 end subscript text end text S left parenthesis text end text g right parenthesis$
2) $C a C O subscript 3 end subscript open parentheses text end text s close parentheses rightwards arrow C a O left parenthesis s right parenthesis plus C O subscript 2 end subscript left parenthesis text end text g right parenthesis$
3) $N subscript 2 end subscript open parentheses text end text g close parentheses plus 3 H subscript 2 end subscript rightwards arrow 2 N H subscript 3 end subscript left parenthesis text end text g right parenthesis$

Number of phases present in the following thermodynamic systems are:
1) $N H subscript 4 end subscript H S open parentheses s close parentheses rightwards arrow N H subscript 3 end subscript left parenthesis text end text g right parenthesis plus H subscript 2 end subscript text end text S left parenthesis text end text g right parenthesis$
2) $C a C O subscript 3 end subscript open parentheses text end text s close parentheses rightwards arrow C a O left parenthesis s right parenthesis plus C O subscript 2 end subscript left parenthesis text end text g right parenthesis$
3) $N subscript 2 end subscript open parentheses text end text g close parentheses plus 3 H subscript 2 end subscript rightwards arrow 2 N H subscript 3 end subscript left parenthesis text end text g right parenthesis$

chemistry-General

For the circuits shown below, the Boolean polynomial is

For the circuits shown below, the Boolean polynomial is

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

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

parallel

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

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

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

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

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

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

parallel

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

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

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

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

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

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

parallel

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

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

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

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

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

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

parallel

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