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CBSE Class 9 Answered

How many calories and steps will be taken to convert 10 g steam at 100°C to 10g ice at  -20°C
Asked by aryantejasva | 17 Apr, 2019, 12:45: PM
answered-by-expert Expert Answer
W e space n e e d space t o space h e a t space t h e space i c e space f r o m space minus 10 degree C space t o space 0 degree C comma space t h e n space c h a n g e space s t a t e space f r o m space s o l i d space t o space l i q u i d comma t h e n space h e a t space t h e space l i q u i d space f r o m space 0 degree C space t o space 100 degree C comma space a n d space f i n a l l y space c h a n g e space t h e space s t a t e space f r o m space l i q u i d space t o space g a s. S p e c i f i c space h e a t space o f space i c e space equals space 0.49 space c a l divided by g minus degree C space cross times space 10 g space cross times space 10 degree C space equals space 49 space c a l space space equals Q subscript 1 W a t e r space h e a t space o f space f u s i o n space equals space 80 space c a l divided by g space cross times space 10 g space equals space 800 space c a l space equals Q subscript 2 S p e c i f i c space h e a t space o f space w a t e r space equals space 1 space c a l divided by g minus degree C space cross times space 10 g space cross times space 100 degree C space equals space 1000 space c a l space equals space Q subscript 3 W a t e r space h e a t space o f space v a p o r i z a t i o n space equals space 540 space c a l divided by g space cross times space 10 g space equals space 5400 space c a l space equals Q subscript 4 S o comma space Q subscript t o t a l space end subscript space equals space Q subscript 1 space plus Q subscript 2 space plus space Q subscript 3 space plus Q subscript 4 space end subscript space equals 7249 space c a l space A n d space i t s space c l e a r space t o t a l space 4 space s t e p s space a r e space r e q u i r e d.
Answered by Sumit Chakrapani | 19 Apr, 2019, 02:01: AM

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