Mass is conserved in a closed flaskबंद फ्लास्क में द्रव्यमान संरक्षित रहता है

NCERT Fig 9.3 · interactive diagram

Parts and their functions

• Conical flask (closed system) (शंक्वाकार फ्लास्क (बंद तंत्र)) — With the balloon tied on, nothing can enter or escape.
• Vinegar (or lemon juice) (सिरका (या नींबू का रस)) — About 20 mL of acid in the flask.
• Balloon tied to the mouth (मुँह पर बँधा गुब्बारा) — It inflates with carbon dioxide during the reaction but keeps the gas inside.
• Baking soda (sodium hydrogencarbonate) (खाने का सोडा (सोडियम हाइड्रोजनकार्बोनेट)) — About 2 g, tipped into the vinegar by lifting the balloon → brisk effervescence.
• Carbon dioxide gas (कार्बन डाइऑक्साइड गैस) — In an open flask this gas escapes and the reading drops (set-up 1). Here it is trapped.
• Digital weighing balance (डिजिटल तुला) — Reading before = reading after → mass is neither created nor destroyed (Lavoisier, 1789).

Original diagram drawn by Simple Learning Hub, based on NCERT Fig 9.3. Report a mistake