WebOct 2, 2024 · ΔE Δ E is always positive when A. system absorbs heat and work id done on it. B. system emits heat and work is done on it. C. system emits heat and nowork is done on … WebSep 23, 2024 · Yes. The WHO-approved COVID-19 vaccines continue to be highly effective at preventing severe illness and death, including against the Delta variant. When it’s available …
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WebThe reaction in which the reactants form the product in a forwarding direction always gives positive enthalpy. Example: NH 4 NO 3 s → NH 4 + s + NO 3 - l ∆ H = + x Ammonium Ammonium Nitrate nitrate ion ion. The ∆ H = + x denotes the enthalpy which is always positive in nature. Suggest Corrections. WebSo, if the temperature T T T T of the gas increases, the gas molecules speed up and the internal energy U U U U of the gas increases (which means Δ U \Delta U Δ U delta, U is positive). Similarly, if the temperature T T T T of … how to replace flag on mailbox
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WebApr 10, 2024 · Answer Verified 241.2k + views Hint: Thermodynamics deals with the relationship between heat and other forms of energy. Basically, it describes the conversion of thermal energy into another form of energy.When heat is absorbed or released at constant pressure, then that process is known as enthalpy change. WebMar 15, 2024 · All temperatures are positive, but a temperature change can either be an increase in temperature ( Δ T is positive) or a decrease in temperature ( Δ T is negative). Share Improve this answer Follow answered Mar 28, 2024 at 19:51 Karsten ♦ 35.4k 7 60 152 Add a comment Your Answer WebMay 6, 2016 · A reaction will always be spontaneous (under any temperature) only if the change in enthalpy (delta H) is negative and the change in entropy (delta S) is positive. north bar and kitchen